Malicious PDF — malware analysis report

Static analysis result for SHA-256 6573724ba1b61681…

MALICIOUS

PDF

101.8 KB Created: 2021-08-25 19:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 0cdcd7393f1a34e4a171709c1f58a7ba SHA-1: 0661b4176bc8f3aa62b57e40d58145669e046ccc SHA-256: 6573724ba1b61681e91af20503d13500d8ac44b1387599243af0c0a210e5fa07
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also features numerous links pointing to compromised CMS upload storage and disposable hosting, with one link specifically identified as a known malicious redirector. These elements strongly suggest the document is designed to lure users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=manifest+itself+in+a+sentence In PDF document text
    • http://regalmotors-jp.com/js/upload/files/45449328763.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/704f535cc56b2a77b83487f4150fd380/sisogezoloferabunefipu.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/pateregedeka.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/8834221677.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/55734659343.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/womemarujeveb.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/47825475661.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/huebnbh96vfudcbh2m5qi2tf8m/10202320835.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/mamok.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/gqsuvidtpa1lj5g9qh31n762pe/gewaxorazofugorawuw.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a1dd1f929---5108127399.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/67684659840.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160f631f37403c---tapuzavorekezigami.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607599701eeb8---denozewidaginemoxisu.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/d25eff1fccfb24202cd5cff2fbe4555e/melomodizumebexagenedazo.pdfIn PDF document text
    • http://starlightcelebrates.com/clients/4/43/43e9139217482d7666ce300faf566241/File/vezofonomawuvunazugijeliw.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ec43976f0d9---gajonanipepusipebabexud.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8a77f4177f9a421b59eef30b2ace8c37/bakulibofuwabixixiz.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/22368367334.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919898b0b50---54647111470.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/filemoxipokelaburit.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160984c741426b---sibunebefitaporafuzedi.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/365adb8efafd77ea635b2f2d1c90b3cc/36044546642.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/gazuji.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021081621441173499.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 17436 bytes
SHA-256: 6816cca033fd251827de2baccf324af1ba068fac00d4bb8697640dac93c9a174
font_01_sfnt_off000159ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 10104 bytes
SHA-256: 2bb609787637cb3b68a801a6045bbd17d141b480272fba30836c0388584d16a0
font_02_sfnt_off00017050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.