Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c1be3152a2192d…

MALICIOUS

PDF

69.9 KB Created: 2020-12-09 10:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 17e3031d020c47db00f5568796f9f3bd SHA-1: 96ecdb9075f9d51ea8ea143faff2c2684e0ba95f SHA-256: 12c1be3152a2192dbf0ec06307f9385c902035cf42cd48003db07075e0f17138
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://trafficel.ru/123?utm_term=mortgage+note+vs+loan PDF link annotation
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/80bff0cd9875b.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/6146481.pdfIn PDF document text
    • https://jijoromosuw.weebly.com/uploads/1/3/4/7/134714512/c6c2722b0.pdfIn PDF document text
    • https://jezonekapinojel.weebly.com/uploads/1/3/4/6/134619201/b57542.pdfIn PDF document text
    • https://lerivifaladadov.weebly.com/uploads/1/3/4/3/134334847/7417880.pdfIn PDF document text
    • https://sepuvoguzunisam.weebly.com/uploads/1/3/4/4/134488558/fezinidoxin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd1c9d7936484054a562/1606286621538/broken_moon_freeport_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bd634f-0158-4ca3-8743-286b089f8564/gto8_watch_setup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc47ff2173fb5383b33ea78/1606713331352/sandal_plantation_procedure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc514f09698b02c7f3b9635/t/5fce8be6a845a4432e12bd59/1607371750467/origami_paper_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6941c1452f90b7f0c5d7b/t/5fc91394eda81c62039343b8/1607013269745/vizag_light_house_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/45242868541.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_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 4920 bytes
SHA-256: c8315450870094d4c07d8d01afd3cd80b13ad0f6a46444c49534c16a672a5427
font_01_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 10524 bytes
SHA-256: 341bab1bb89465f4c0fcfd480ef8da1d2a4343441c50dd24491d630ce7f659b0

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