Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15e03a2afa93443…

MALICIOUS

PDF

71.1 KB Created: 2020-12-17 04:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1f6737347fc887f0a779544df635eb7 SHA-1: d412508a0a8ac14420e14f468459a31983acf9f0 SHA-256: a15e03a2afa934438143e12180dd02481c1c1cbba79cb87518d94c010962401f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=turkey+bacon+in+toaster+oven PDF link annotation
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/5533768.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/wexukufedepim/spectral_theory_of_automorphic_forms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd158af6f5f91feb7033cc/1606227339928/pawuborevowopaja.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/android_bitmap_centercrop_xml.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5168716f6d44b07d98e8b/t/5fd65980164d0f203c7a1acf/1607883137616/fusilewuvixegefobutis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf519018e72e5fdbce5745/1606373777718/12241336485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe078f0f-1cdc-436d-bc85-eddae8000b57/peromisuzefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176cc116-ce7c-486c-ad68-3c6cb08a95d9/henrico_county_math_modules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51d3c5bcb0228a29dbe1f/t/5fd72d09034a586a4f5d6811/1607937289756/solutions_acids_and_bases_review_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/fofaloranobab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc156509-dcd6-431e-b3e5-b30d38e2af0b/breviaire_catholique.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 5076 bytes
SHA-256: bca0681d922b1b5b00704f1ca783bcd6afdc20da6b4ba06af5a8fe021bf9e87a
font_01_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 10516 bytes
SHA-256: 7892505a48428defd2b013250d3c1d9768b114bfcf68a4d898b95e0c9ff53006

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