Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2af30b0b2209ad9…

MALICIOUS

PDF

86.2 KB Created: 2020-11-20 05:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bd2304d4721635e601b6eee793eeee8f SHA-1: 9d150033c3dfa94c0776ddb5f381522eba2ff229 SHA-256: c2af30b0b2209ad97090372536c91ef51cd89009f6a6a49d7549898bc111615e
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 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=pearson+education+math+worksheets+grade+5 PDF link annotation
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/gagen.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/1785002.pdfIn PDF document text
    • https://zivawopoxiba.weebly.com/uploads/1/3/4/3/134355714/bajifa_budito_nanexeraz.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/fagatuzemosifo.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/famub-muzufewadofi-panosodojinimij.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/wifozuxeku/free_bowling_flyer_templates_for_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/17216052449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccee552-350f-4947-b1c9-bed7b697320d/free_movies_on_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/hillel_college_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc644ef-d029-4619-b7e1-299120d525c9/radixojadejupaxenufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4959d9b2-e2e4-4447-9a23-7757f3785705/8626049159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a74efa-1e27-456f-a555-d2c9122a4cc1/izombie_season_2_episode_1_putlocker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7202aec0-fa62-48c5-a956-f4e7f0f6cae9/66406485297.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/ffxiv_fate_leveling_guide_stormblood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0612ca40-9be4-4e23-8dc0-28a0702cbee2/bonivipovoxuverowoxikugew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9443078-afe0-4efb-ab64-8f79c73ac29a/63064020004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dfa0a0-ffd3-4067-bfdd-6d29ac0316fa/fofesomudirukodileli.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_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 5600 bytes
SHA-256: bda8efd4dd61ab134a3a2127b3b50eaeaa07a5a4b5a5c84065374029109f43f5
font_01_sfnt_off0001286a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286A 10244 bytes
SHA-256: 90a04ddaad1c9656d7995516411199bc80351db43b8b0c6591e0cc7b3082129e

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