Malicious PDF — malware analysis report

Static analysis result for SHA-256 a171fe51c120f850…

MALICIOUS

PDF

66.9 KB Created: 2020-12-21 19:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ab72bed0ebe1e806f3b127e398c0859a SHA-1: 121232a3b504e8c1683509c4abbb5dbaa6994dd6 SHA-256: a171fe51c120f8508adbe523ff162ae01c96d8c895c35592c86f340ebcec0e40
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-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://traffset.ru/123?utm_term=ford+m5r2+manual+transmission PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fb25dfd238f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_5fb27e9ee4121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5f8d4ba638d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fb3ef7a2d6ed.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/sezididume-zaromuxarit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b011efa-833e-41f5-9208-b10d7ba39d0c/fortune_telling_with_playing_cards.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ec66e5c7695ca9b54de7/t/5fd7316b034a586a4f5dcc97/1607938412429/70902245694.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/zolujunedimubenonege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbaba9ba-b4a0-49f4-b0b7-51826f5d6ab1/89410552584.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a3c60f2895dc1eafeb7/t/5fc354c79b1ed03538477cac/1606636746049/57452037438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d84827-3ef0-4002-8139-e233f43002fc/how_to_get_higher_enchantments_in_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76d4fee-b2a6-429b-a2f6-cc21d1130918/5e_fighter_battlemaster_maneuvers.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/best_business_schools_us_news_world_report.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_off0000cb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB83 5184 bytes
SHA-256: 2812bce38654eb20fa92b760ca7e65a1b6c53ac45d8c76de3e17345910daec07
font_01_sfnt_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 9948 bytes
SHA-256: 62a2cca8962d1c6fad493c116edd5146b028d9c84b262a058655c70d35a3eea6

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