Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22416d91b178efb…

MALICIOUS

PDF

82.9 KB Created: 2021-09-06 20:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb8d48d92e6811b270f1a6a99050c1a9 SHA-1: 789e960677656124a841443fc30983a0b80e48e8 SHA-256: e22416d91b178efb29a779404d330b5985ec377a5f61d85e5ac808b690664899
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://quickvideo.nl/userfiles/file/3243709670.pdf In PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5dd73c34---4039647351.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b559a898872---xitusolujimexifesus.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/xatalofunof.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/joteguworaxeduxore.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/gofazowites.pdfIn PDF document text
    • http://tulga.ru/editor/files/niwosokoxutivalegiwe.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/katavinemuzexosepado.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/76956218885.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/4fecc15040dbc5b68696627c2312cea8/xolokegemesen.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/mixejonuku.pdfIn PDF document text
    • http://scpt.it/userfiles/files/lonepaladodovupejuxul.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/libanitoduzotewamezexere.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/7966055343.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/47840897118.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b9bd22ec1ce3e5f4053f30632af0413d/99898277760.pdfIn PDF document text
    • http://novafish.it/userfiles/files/47512337110.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ed6203d1adc8a82494659fb0ede8d777/76605524542.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ac0d7f0127d04a2c12fd91b2833aa7bf/tuxodevupawerew.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d4c3901bcbab9d62fabfc1bc13cab1e1/foramelevunutawevavaw.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/masugox.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/21629600901.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889e45ad46c---26844044483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gi+system+anatomy+pdfPDF 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_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 17144 bytes
SHA-256: a0ff6a647bd36a270de6869995f0cd43a7ad1994c66fc6ef6740dcccf4821673
font_01_sfnt_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 10664 bytes
SHA-256: e25c761e745466cfc5f4f2b0c7007964e1572a9ff27f2003ed87f0a2be74cc0c

Open this report in the interactive analyzer, or submit your own file for analysis.