Malicious PDF — malware analysis report

Static analysis result for SHA-256 252308b329abdca0…

MALICIOUS

PDF

40.9 KB Created: 2020-03-21 20:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: b1d31c49c502235f9e1312ef24ac5b95 SHA-1: c2548a251c1d6ce7f32e8fee0fc201c3f80f7a4c SHA-256: 252308b329abdca09e65bb35d9415a357f4254f845b5fb908ea006595fefc320
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file contains a large number of external links to other PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a link farm, suggesting a tactic to manipulate search engine results or distribute content from multiple sources. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and some of the extracted URLs, reinforcing the link farm observation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://mrs-mills.com/uploads/1/3/0/4/130483756/130483756.html#instrumentos+basicos+de+laboratorio+pdf PDF link annotation
    • http://www.apdesignsdc.com/uploads/1/3/0/4/130435787/3293496.pdfIn PDF document text
    • http://pressurewashpearland.com/uploads/1/3/0/4/130477249/nutowiwijagapej.pdfIn PDF document text
    • http://metamichelle.com/uploads/1/3/0/6/130639369/c2ee7a1.pdfIn PDF document text
    • http://jamesbaylee.com/uploads/1/3/0/4/130435990/nadukixejawo.pdfIn PDF document text
    • http://blissfulmomentsbyamber.com/uploads/1/3/0/4/130475879/maxoze.pdfIn PDF document text
    • http://ioamovement.com/uploads/1/3/0/4/130476624/4077058.pdfIn PDF document text
    • http://pitmeddenmusic.org/uploads/1/3/0/7/130739492/tipujinakedaj.pdfIn PDF document text
    • http://mustoelaw.com/uploads/1/3/0/7/130775274/kikugogirotuxon.pdfIn PDF document text
    • http://teachersbeadhabit.com/uploads/1/3/0/6/130639310/4482232.pdfIn PDF document text
    • http://pathproduct.com/uploads/1/3/0/5/130551836/3247104.pdfIn PDF document text
    • http://cansolvest.com/uploads/1/3/0/7/130776852/purir_wafew.pdfIn PDF document text
    • http://www.vittskrap.se/uploads/1/3/0/6/130620708/45f969.pdfIn PDF document text
    • http://ihaveachoice.net/uploads/1/3/0/6/130639300/8885935.pdfIn PDF document text
    • http://otherworldlyart.com/uploads/1/3/0/4/130489025/8926e.pdfIn PDF document text
    • http://takarafinancial.com/uploads/1/3/0/3/130323342/8763105.pdfIn PDF document text
    • http://cpanel.roryward.com/uploads/1/3/0/7/130740133/4be53c93d36855b.pdfIn PDF document text
    • http://nomadicwellness.com/uploads/1/3/0/7/130740209/4942627.pdfIn PDF document text
    • http://getdriven.us/uploads/1/3/0/6/130639386/a45e5b780df0a.pdfIn PDF document text
    • http://jennontai.com/uploads/1/3/0/6/130620575/686049b66b08.pdfIn PDF document text
    • http://thatssomegoodshirt.com/uploads/1/3/0/6/130603922/3975784.pdfIn PDF document text
    • http://camelotk9.net/uploads/1/3/0/7/130740124/7915048.pdfIn PDF document text
    • http://www.whoiskatrinamitchell.com/uploads/1/3/0/7/130739508/2958140.pdfIn PDF document text
    • http://downeynotarypublic.com/uploads/1/3/0/7/130776141/rederidewuvipopezox.pdfIn PDF document text
    • http://powerbabes.net/uploads/1/3/0/5/130546606/sibireguz_nekafijiz_nivig.pdfIn PDF document text
    • 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
🗂 Part of campaign: ioamovement.com 6 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F5 8244 bytes
SHA-256: 44bbca18918053549a176dd13ced7535b28dbe27c8784a97cca3b18703ce65ca

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