Malicious PDF — malware analysis report

Static analysis result for SHA-256 113d77dd9457ffe3…

MALICIOUS

PDF

40.6 KB Created: 2021-03-06 10:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2bb94bd6663dec8d44b8ad699ba56c93 SHA-1: 386043bc85d88421bdcf14b9eb96768d5adae185 SHA-256: 113d77dd9457ffe3c38ae812da7ed49ca2ffbaed7b40f458d2aaaa7e156a5ba0
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8447

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://fokemale.ru/aws?utm_term=mbti+career+test+free+online PDF link annotation
    • https://fubuvomaxafufil.weebly.com/uploads/1/3/1/6/131637814/sariki_vazumijajib.pdfIn PDF document text
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/jodilarujuzezow.pdfIn PDF document text
    • https://kotazadan.weebly.com/uploads/1/3/4/3/134349323/5364117.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/36041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aad96f9-35d8-43eb-a616-ac05ecad54dd/wesudixoxibubiginusovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428ddbb6-a944-4808-abe5-833b5bcb5e6c/dd_5e_ancient_white_dragon_stats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93879e0-c12b-4b18-a18e-eb3492366a63/13660473540.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/7430350477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b07091-f330-468e-8b51-93f50ce81950/certified_security_project_manager_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/gisiwuralom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bc01c9-4664-4ae1-acc3-60ba423529b8/1781131548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dade15-6237-428a-85fa-4b4bcb399ceb/bikuborot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec3eb1d-b79d-47b3-8780-a4b94b8be7d6/how_long_do_you_cook_a_turkey_breast_in_the_big_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/what_is_a_tempus_fugit_clock.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_53a8ab6113ec4e31a4dc9d0d91f854a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ccdf30-1196-41d6-a02f-b078b9d4595d/52481641847.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_7a6b7ae1838b457993c7e049f7666dc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1430a177-1783-4d35-b15a-e25a96ab75bc/nafenop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d602d63d-a325-48bd-80d4-1c2fdf9b6830/stress_relief_activities.pdfIn PDF document text

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