Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfabb4bd0524c74…

MALICIOUS

PDF

70.0 KB Created: 2020-11-24 04:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5539eed2ada442e3ba2e5be623cd3521 SHA-1: 1dc6444ae606e7df9f0c2adcefe5fbbd823c1cc0 SHA-256: dcfabb4bd0524c74b687e2e975643d827a678b5c94a220f8ad4db5ba888229ef
226 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel deliveries. It contains a significant number of external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or phishing sites. While no scripts were directly extracted, the presence of embedded URLs and the overall structure strongly indicate a phishing or scamming attempt, likely leveraging social engineering to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://trafffi.ru/123?utm_term=to+grandmother%2527s+house+we+go+lyrics
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/wirejuwewurewi.pdf
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/7634499.pdf
    • https://cdn-cms.f-static.net/uploads/4453740/normal_5f9fad37c426a.pdf
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/e40c7.pdf
    • https://vezuwuzasulibe.weebly.com/uploads/1/3/4/3/134354720/sujeronabugakuz.pdf
    • https://cdn-cms.f-static.net/uploads/4419826/normal_5faefd462a38c.pdf
    • https://turamidiwirak.weebly.com/uploads/1/3/4/3/134340523/cf1d9f3a.pdf
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/mowisu.pdf
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fae62802b822.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gavexilatuvitaz/savavonelatomo.pdf
    • https://s3.amazonaws.com/felasorarabipis/96133424709.pdf
    • https://s3.amazonaws.com/debamijizozexo/mafuvobo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35c.bin
dc992cd3b9986a344c948ae1105c1480d0b5cc8678a96e0a64c705ab4a851432
pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 5532 bytes
font_01_sfnt_off0000e620.bin
4eb327096905522c07d39aec74d6a025a6a89307e4097ed9477e8313fd04f959
pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 10772 bytes