Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef3ccd978913c56…

MALICIOUS

PDF

66.5 KB Created: 2021-09-21 15:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7eef6ab52086db3e52669765e90daff4 SHA-1: efb1a5896780d27e6c1b5c321f8212292bf71453 SHA-256: 8ef3ccd978913c56c343934a0134a52a57adcab205d2e45d24e86f139bef156d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and is designed as an image-only lure, typical of phishing campaigns. The heuristics indicate it functions as a link farm, directing users to various compromised websites, including those using WordPress upload storage. The embedded JavaScript likely facilitates the redirection to malicious URLs, aiming to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pixomot.ru/uplcv?utm_term=adb+by+wifi PDF link annotation
    • http://szintai.hu/ckfinder/userfiles/files/71432477026.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/36033982093.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/6316948024.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/nipogujejepepudole.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aa0d9a560---gazilinejaxu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0d51ec76d---kanuxarepixobomom.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/97673223264.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/tolurosogeduraruja.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109200616278322.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2b0eb88bff025253bceecef0f73097d5/nelidonikisilobizupoga.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a44992a9355d4653fa89b3b84f745468/31237985858.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/fujedakavetimomoputi.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/43715050271.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/rokivadez.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/40134565805.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/3911249191.pdfIn PDF document text
    • http://jaatkinson.com/userimages/kodek.pdfIn PDF document text
    • http://rotang.net/userfiles/file/82443169891.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/pupadopivazamaj.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/81062864420.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/gagugopitadixaropapufat.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/30652551822.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/bajoxinotepajawutur.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD74 9736 bytes
SHA-256: 7b657667039e8b239934077deaa8def1044f88dd3d4c5d29fdc250f839ad8656
font_01_sfnt_off0000c2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D0 13828 bytes
SHA-256: b392058d82339d3968e4703d8e507ff5cc29ea988e304352c7a7b813433af054
font_02_sfnt_off0000e500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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