Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8baa2c47ca985af…

MALICIOUS

PDF

70.6 KB Created: 2020-12-26 01:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d7446b53f3c6f3b08018ebe532283013 SHA-1: 75f704848154521a294dccf1bb8aca82e93d880a SHA-256: b8baa2c47ca985af3086ef358027f4fc3f991d2191e82e6e70a30df146866c72
176 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. While no scripts were extracted, the presence of many external links, including one pointing to 'traffnew.ru', strongly suggests a malicious intent to redirect users to potentially harmful websites, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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) 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 https://traffnew.ru/aws?utm_term=balsa+wood+sheets+in+bangalore PDF link annotation
    • https://cdn.sqhk.co/dutebevon/rgeheTo/51680292394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_5fba323ac00cc.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/0f729437e74944.pdfIn PDF document text
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/5e7d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f935774e1704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5fc9beac9a7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5fd78a4a4464b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f9c75ae78adc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5f905e36467d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_5fda6d3c9cc9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvazi/royal_adelaide_show_showbag_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xanofamaja/pirates_of_corellia_empires_and_puzzles.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/wewivaridikizuxugumezu.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/dafagi.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/77235813940.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_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 5368 bytes
SHA-256: edf9da3e9e9dad0d57ea0ea0f196f9ed368a17e9fcaa62e10696657207591230
font_01_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 11064 bytes
SHA-256: d3da0ca1bf8bb86a78ef4490faf9520f6778e95e7fe60448c5011517ebc3e0dc

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