Malicious PDF — malware analysis report

Static analysis result for SHA-256 afadcad8d76be5ba…

MALICIOUS

PDF

69.5 KB Created: 2021-09-30 21:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e679617a79bd80a3f5d9b21b7146e6d9 SHA-1: 4cb5954835d6fd441c7c5c04c1fadb8d4aa59181 SHA-256: afadcad8d76be5baa51e1607684bd2c09362a754925e62717b59a5e5c43be479
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It exhibits characteristics of a phishing lure, using an image-only design with clickable links to external URLs. These URLs are hosted on compromised CMS uploads and disposable domains, suggesting an attempt to distribute further malicious content or harvest credentials.

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://autostyle-japan.com/js/upload/files/98032280904.pdf In PDF document text
    • https://kalitelivideoizle.com/resimler/files/35236856704.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/guziboxefagaforokuzuwite.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/zafupamenugapezelikamani.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/sebolipodaritenav.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/sukikegum.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f54e23dfb7---samukekeza.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/94237832297.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dac688513---74823767853.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/dodanidetusug.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/zoromofumegopijidiwafew.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/94059434341.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/kuxez.pdfIn PDF document text
    • http://reichspfarrer.sk/file/javegib.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/41760081802.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/65898963937.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/64969732485.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/64003309232.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/79774564788.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f7d2cb635---gawiwusibalorisafop.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/gaxovaxug.pdfIn PDF document text
    • https://micsys.in/userfiles/file/53051673902.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/tebudezax.pdfIn PDF document text
    • http://hijoin.hu/editor_up/98582741579.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=watch+cheech+and+chong+up+in+smoke+online+free+123moviesPDF 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_off0000b191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB191 11660 bytes
SHA-256: 3978f553ff7c97cf3a9d8c110dbcee455a88e5de2d5fb3c770b34bfa8281a8be
font_01_sfnt_off0000cd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 13960 bytes
SHA-256: 99d4397ae5de4e2e9703f6320f40c563695cf225760a993adfcb1a832d4477aa
font_02_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1