Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e97ec354f8ecaf5…

MALICIOUS

PDF

66.0 KB Created: 2020-12-24 08:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a40616d9aadee9594b0e39a8f07c6c63 SHA-1: 7d01866a6b878eeed7bc12a9c84795d8f679dc02 SHA-256: 7e97ec354f8ecaf52342a868677c9faec015b28e6f827234d617c1b8be16d16f
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with the primary URL being `https://trafffi.ru/123?utm_term=deuxieme+etape+worksheet+answers`. This suggests a phishing or malware distribution attempt, masquerading as educational material. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of external links, further supporting this malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness.

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://trafffi.ru/123?utm_term=deuxieme+etape+worksheet+answers PDF link annotation
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/xoxopejopo_gufekig_zinifomi.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/jiHjhjh/3620636833.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/XgdZLwN/mp3_player_lauter_machen_download.pdfIn PDF document text
    • https://funiduned.weebly.com/uploads/1/3/4/7/134773133/3561299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xetasif/47073411351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84f106f-b501-4ac9-80ef-82fde93a8202/unison_league_cleric_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/74474201507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d408604-18e5-4253-a277-0e031d2e51b5/16638456826.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/difference_of_voltage_and_current_transformer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621fea5a-3755-4235-b9cd-6acce7e24bdc/amscot_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f163ed97-fe3e-4de4-884f-1fcf5aeb49fd/brighton_high_school_colorado_family_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b1f3b2-6420-4010-ba63-da2b3eb198e4/vojobalenidijaxipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4b812a-4fb3-4d40-84b3-3877546b1b2b/35188085641.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/77551208334.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB697 5132 bytes
SHA-256: f58f4720e6e6253c7e9d3ff83e9da3e5967869ffb2fdd0c53579c57fb7e04d87
font_01_sfnt_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 10932 bytes
SHA-256: 18de56473820b52863c1c404a462ff767012354a6a70fc4697c996ae80f2d03f
font_02_sfnt_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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