Malicious PDF — malware analysis report

Static analysis result for SHA-256 80aaa3adc94a26c5…

MALICIOUS

PDF

39.0 KB Created: 2021-09-15 10:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5b5979ef938ca4e0d6b7335f53235c5d SHA-1: 9e42aae44146d2b6b2a4894b800b183067ea1499 SHA-256: 80aaa3adc94a26c5c614b6574e6264dcda4660744fae95b734dbb2533b4a3d3e
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF is identified as malicious by multiple heuristics and a machine learning classifier, including specific detections for phishing and trojan behavior. It functions as a lure, presenting itself as an image to trick users into clicking a link. This link redirects to other PDFs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 38 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://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/katerebekafavuliserug.pdf In PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/b2ctt77lhm3ce2bc8oe4fru2t7/27937655442.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/52779959295.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/7667255577.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/sisesevoxujuxoterutinipa.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140095aae9e1---sepuwujix.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/mojuregi.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/vesuxexakegurif.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/23793481082.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/vakikavagafewuvi.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/nifarogufozakideb.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/nuturimedugorenogigironit.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/10897379976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+do+snapshot+on+android+phonePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0d599e0dddfb7fba7b3faa3dd050985a/rexisomanasuju.pdfIn PDF document text

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