Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfda7df707aa8107…

MALICIOUS

PDF

95.9 KB Created: 2020-06-21 07:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 70f2f96c9c92f1434c0c41ea8ecbf840 SHA-1: 2a9a40a9aa27ad7626ef6c26c477318f284b9d6c SHA-256: dfda7df707aa8107d2cb7274e1e68b2786611ddb40518833e848af643bb64db5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1539 Steal Application Data

The PDF document contains a lure for MFA or one-time code harvesting, consistent with credential phishing. It embeds a large number of external links, many pointing to PDF files, suggesting a link farm designed to improve search engine ranking for malicious content. The document body, though heavily obfuscated, contains a URL that appears to be part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://webmail.edgingtonroaddistrict.org/uploads/1/3/1/3/131398156/131398156.html#fortimail+admin+guide PDF link annotation
    • http://staffsourcepro.com/uploads/1/3/0/4/130491947/8713466.pdfIn PDF document text
    • http://mail.jerryshirts.com/uploads/1/3/0/7/130739655/8509446.pdfIn PDF document text
    • http://hostmaster.lymeregisholidayhouse.com/uploads/1/3/0/2/130287407/sunabun.pdfIn PDF document text
    • http://caringhandsmovingfoward.org/uploads/1/3/0/4/130489054/567314.pdfIn PDF document text
    • http://cooperspecialtypainting.com/uploads/1/3/1/3/131381288/6551535.pdfIn PDF document text
    • http://ravenstedefarms.com/uploads/1/3/0/3/130313183/fc4c6ef3.pdfIn PDF document text
    • http://3rdrailmediasolutions.com/uploads/1/3/0/6/130604034/xuzapevodiba.pdfIn PDF document text
    • http://carmelomilazzo.com/uploads/1/3/1/3/131379194/40bfd537270c0f.pdfIn PDF document text
    • http://smrestoreutah.com/uploads/1/3/0/5/130590142/zufuloraw.pdfIn PDF document text
    • http://74-123-72-148.mgwnet.com/uploads/1/3/0/5/130588947/9348088.pdfIn PDF document text
    • http://travelex1.com/uploads/1/2/9/6/129643752/129643752.html?hpIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4C 4804 bytes
SHA-256: 9f496e1d6a68b207679799a7eed5e524dcfb639a9ba670ae1d50879b74790204
font_01_sfnt_off00014f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F77 10484 bytes
SHA-256: bc4d22f756de381dfadf2243bb192abe3f256d76595b4dd330f54a69f75bec02

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