Malicious PDF — malware analysis report

Static analysis result for SHA-256 708a55b16f002279…

MALICIOUS

PDF

67.3 KB Created: 2020-11-28 08:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 702074acc1683d83bdd2be908b3ead85 SHA-1: 64639084c5db59c39338413f85d2de93e745c180 SHA-256: 708a55b16f0022799148df2cf1b0a2ab10b5ee3eb1cf38c5b6fc8e85fdbf8c1f
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The primary redirector URL is identified as malicious. The document body, though heavily obfuscated, suggests a lure related to 'family life merit badge answers pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=family+life+merit+badge+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5fa9b63d7c872.pdfIn PDF document text
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/8723e6d9e132e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8827058b009.pdfIn PDF document text
    • https://maviruwatibifiw.weebly.com/uploads/1/3/4/4/134490209/lofopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5f8c47da03697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fa1798bf4020.pdfIn PDF document text
    • https://toxavepudu.weebly.com/uploads/1/3/4/6/134634724/mivevujo-riwokamuguf-jazikodufi-takofilibibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f8e494d8a24a.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/sexate.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/balasogup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8bfd5801115.pdfIn PDF document text
    • https://kugugurufive.weebly.com/uploads/1/3/4/1/134108893/vepawepu_komifopudoxosot.pdfIn PDF document text
    • https://musagitunoton.weebly.com/uploads/1/3/4/3/134368320/rukisumaxekode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5fbb8fba949dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a96c489-a0a8-4bd5-9a66-d61c463ba0a6/manual_journey_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b42a396-8c44-443a-a116-f0f0076afd82/rifufugipusatejereduf.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/piwoz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0D 5652 bytes
SHA-256: b1d8a3b90f6f49e80a02ce6fca2f1e6f36ddfe81d0d005c4d4cd3eacdb30c1f3
font_01_sfnt_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 9732 bytes
SHA-256: 1d787113db507caf9f4960aac1a87849de3484e1274367ee81f93fe4e498a38f

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