Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b190ee2ec50a9c…

MALICIOUS

PDF

68.2 KB Created: 2020-12-15 12:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 145117efa8d01fc85178d5388028bc16 SHA-1: 30c11fbaa235ad43fb6706c5873397d9ca2d7152 SHA-256: c0b190ee2ec50a9c899a1e9503065cc517b5108f24378e2cae4522dfd008f097
254 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru', which is also listed as an IOC. The document body, though heavily obfuscated, contains text related to 'Minc foil machine heat settings', potentially part of a lure. The presence of numerous external PDF links and a critical heuristic for a link farm suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=minc+foil+machine+heat+settings In PDF document text
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/zaromozuwisama-nerali.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/7289680.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/zabevog/medical_examination_report_d4.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6cd63570fb44d1fb4d6a/1606380759411/96281203240.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/47104997604.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/tusodufuzamot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce5e1d190b057dd380f1e5/t/5fd69c893ebe041631691be7/1607900297680/basof.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/jukupemovogojetixaxeke.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/mindtap_answers_world_history.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5168f3de5e49b55aeb32/1606373748220/35011468788.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/goodreader_fr_android.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_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 5204 bytes
SHA-256: b65b563f86302b952074dae2794a4a07f2e6356fe7ede3e8af40689f9f9f8ad1
font_01_sfnt_off0000dd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD51 11468 bytes
SHA-256: 794f8ec9c4fda6c4cd441ea4aad02eed5cd043edfce3d54eabc54fdada158c5a

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