Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec54606a36e3dd3…

MALICIOUS

PDF

62.3 KB Created: 2021-09-11 22:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4a386954cbf4b96a1a56834f2cdb4623 SHA-1: 16258930df878ba6549b085e6e83240b4197c22a SHA-256: bec54606a36e3dd3c17947c536f52f1ce9f57695d5e0e46196f1b94a4853d372
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links, typical of social engineering tactics. The document contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5578

Heuristics 6

  • 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 62 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
  • 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://tsraccountants.nl/mailing/images/photo/file/82626058225.pdf In PDF document text
    • https://organicearthfiji.com/documents/file/vigolosegisijexutekoni.pdfIn PDF document text
    • http://cl-pub.com/files/files/lugavasudegiwowudazud.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1ef37b91---pabutexuvesukimitidopixux.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210901160315.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/rodim.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/77364952511.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/57418866157.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/libobixor.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109081628545632.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/73786129653.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f34173322c---45293846888.pdfIn PDF document text
    • http://shopabrang.com/images/files/46759418334.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613854beb7f35---fujijekuxifujime.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kobikewigatunowakim.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0b0c6cee44bfc0b0743b973c2fcbea3b/nerefosonejova.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/68957710231.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/pafukulasux.pdfIn PDF document text
    • https://coevent.ru/upload/files/daram.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/nixewukibotoferukujejab.pdfIn PDF document text
    • https://kristinanamaste.eu/files/mawidolesiriforijabituvaj.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/eebda6e0bc14c5274d0619d75b0654f7/64288120802.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/sotumavefomizef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+restore+the+photos+deleted+from+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 10588 bytes
SHA-256: ee75b994d99d06e6cbac09e7cea9be5833f21c2c5de1c964c32c4d945c8fd292

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