Malicious PDF — malware analysis report

Static analysis result for SHA-256 7425e26ef99b167e…

MALICIOUS

PDF

69.7 KB Created: 2021-09-29 01:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 42804fed50b1ba077cb7a202394cd8a1 SHA-1: c84d03f2184dae4b5c0df99c862d15d1d7803731 SHA-256: 7425e26ef99b167e1bce7ac2d0ee0ebb214cf61f185c00f6c96db6163d0d4e0b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure by multiple heuristics, including an image-only document with an action trigger. It presents a link farm pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of embedded JavaScript indicates potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 69 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 http://pozitron-s.ru/userfiles/file/kuxixanekaginobus.pdf In PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/muxubikelirobinujugiwo.pdfIn PDF document text
    • http://retailjewellerindiaawards.com/userfiles/file/47759882678.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/10045467088.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dba1db6bb---lojunofazafavut.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/40531312667.pdfIn PDF document text
    • http://fgosvo.ru/files/files/tatepozisoxi.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/lavadinemiral.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/55432312492.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16140384f6d1bf---pusofapejinunonosexekeko.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/jatazodadevakimex.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/66167106838.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/deturafezebimozi.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/donaboledanijowusaxatis.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/8559709925.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615387f6b7cb1---22140222744.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/62762296887.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/86361626505.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/sisamaweno.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/17891973008.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/65000316830.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/45181669315.pdfIn PDF document text
    • http://isitekmuhendislik.com/userfiles/file/kemijumuwotu.pdfIn PDF document text
    • https://tierlistei.ch/downloads/gejezaxefipogugu.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/noxovumapikevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=use+android+phone+as+webcam+bluetoothPDF link annotation
    • 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_off0000b376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB376 11112 bytes
SHA-256: 8bf4d46d9aa45f7a9b7358909dcf5a91690d305397d03a54726fcbce0463c9c7
font_01_sfnt_off0000ccff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFF 14300 bytes
SHA-256: 1d4a165f2545e8cfca8b98ed291f92ec4f12e139af8e3423b3e02f496b2bed43
font_02_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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