Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bffe66c642c3306…

MALICIOUS

PDF

46.3 KB Created: 2020-06-15 15:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 7dade0010ea27cd4cf11c14540caf25d SHA-1: 9bce174cc6ea9b16af34aef50c07a04e535f00cb SHA-256: 6bffe66c642c3306f5de1c6108fd4b9c65803a0fe6e212101d731bea37812b73
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to PDF files with numeric slugs, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, contains a URL that aligns with the "consumer guide reviews" lure, indicating a potential phishing or scam attempt. The presence of multiple external links and the ML classifier's high confidence score support the assessment of malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://cpcalendars.alamasuakpulonyo.com/uploads/1/3/0/4/130479008/130479008.html#consumer+guide+reviews PDF link annotation
    • http://selfinversion.com/uploads/1/3/0/2/130289523/810da79f8.pdfIn PDF document text
    • http://nadinesteklenski.com/uploads/1/3/0/7/130776027/jutogogakazubonomona.pdfIn PDF document text
    • http://cckcconstruction.ca/uploads/1/3/0/7/130776866/1463899.pdfIn PDF document text
    • http://emsworthupchurch.org/uploads/1/3/0/6/130621525/worep.pdfIn PDF document text
    • http://onestoproofingorlando.com/uploads/1/3/0/4/130436307/5903688.pdfIn PDF document text
    • http://shamraeffengineering.com/uploads/1/3/1/3/131398313/3542401.pdfIn PDF document text
    • http://becomeagoldstardirector.com/uploads/1/3/0/8/130873894/5f2f1c0f9819.pdfIn PDF document text
    • http://fenway-cafe.com/uploads/1/3/0/3/130324137/puzenebi_tavanabedor_fipatuzurudigul_bipebadejojip.pdfIn PDF document text
    • http://deutsh.travelmittelamerika.com/uploads/1/3/0/6/130639869/9663244.pdfIn PDF document text
    • http://showmeoverstocks.com/uploads/1/3/1/4/131437982/wifoki.pdfIn PDF document text
    • http://thaochibi.com/uploads/1/3/0/4/130436218/d7180f7d2909def.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sofifetipi.files.wordpress.com/2020/06/43012085685.pdfIn PDF document text
    • https://nilibijo.files.wordpress.com/2020/06/1263243680.pdfIn PDF document text
    • https://xolupola.files.wordpress.com/2020/06/durosotazirigimexuf.pdfIn PDF document text
    • https://tezufaxaji.files.wordpress.com/2020/06/riverafem.pdfIn PDF document text
    • https://naluwanamele.files.wordpress.com/2020/06/95432966795.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

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_off00008677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8677 11852 bytes
SHA-256: c5966f5cce61742e6ab2306a6a7feb8160df78d6b27b2f29d961082cb3095284

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