Malicious PDF — malware analysis report

Static analysis result for SHA-256 d002af677ec8a4aa…

MALICIOUS

PDF

67.2 KB Created: 2021-09-24 18:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e259f14d2f52100123915bdfcfaef3a6 SHA-1: d022b47c0d132a41624c7da2f8c124927e75b4d7 SHA-256: d002af677ec8a4aa3da4e79f009d5839acc7169664caabc2649504c7c7527ab6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure with an image-only design and clickable action triggers. It contains numerous embedded URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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 67 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.
  • 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=shadow+fight+titan+apk
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/julokidukadesalufej.pdf
    • https://miminku3.com/contents/files/votupexodikiziziliwapo.pdf
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/58038950207.pdf
    • https://novahealthclinic.ca/userfiles/file/wegokutufefosufezuz.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16148366d79b81---26458952158.pdf
    • https://biserica-izvorul-tamaduirii.ro/files/dibugod.pdf
    • http://pamatudarbai.lt/ckfinder/userfiles/files/93935087135.pdf
    • http://ailizia.com/userfiles/99182034436.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/smd0nj31e2g2o2275mejm53ona/zejomuxuzukibolebemave.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e2835ad76b3470001873a9e669a19043/residenabadujulemufivem.pdf
    • http://zhongguohuachun.com/d/files/64345697731.pdf
    • http://tungalag.mn/userfiles/files/71051000417.pdf
    • http://hebakotb.net/userfiles/file/14463439723.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0e101ea3---63078153584.pdf
    • http://njbeihang.com/uploadfile/file///2021090712550279.pdf
    • http://bongoes62.dk/userfiles/file/7643425252.pdf
    • https://maturana.cl/upload/file/7165343972.pdf
    • https://mamalight.net/business_school/uploads/file/samuvutitegaforag.pdf
    • https://clove7.com/userfiles/file/jifibudawolep.pdf
    • http://danbikoreansj.com/uploads/files/mimoriwerulutek.pdf
    • http://ngor2-3.com/file_media/file_image/file/84451680542.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6F 16792 bytes
font_01_sfnt_off0000c381.bin
b2f5fbc2740a2cc3712d980326c2325bca0fdd296207aad26c4f1fadfbc7526e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC381 14472 bytes
font_02_sfnt_off0000e7a9.bin
6fb7db2dbe4eedda8af2a7d0a06ed6515af9aababbe7e15204f48c640311c84f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 10584 bytes