Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5608166470307e…

MALICIOUS

PDF

81.2 KB Created: 2021-01-03 20:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3ef005330a687ca64be004f59c1b61f5 SHA-1: 39f71ff8f95a62d70def94d4682a6e766c7b7da7 SHA-256: 3b5608166470307e39137938b63f5b25b95a6e131976645bc6a65ed6e7a93f66
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being traffickednew.ru. ClamAV and an ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites, consistent with phishing or malware delivery.

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://traffnew.ru/123?utm_term=pontificia+universidad+cat%25C3%25B3lica+de+chile+english PDF link annotation
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/2f37e239ffbffc.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://uploads.strikinglycdn.com/files/2355e237-53c1-47c8-b016-eac11093ce60/12398009492.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/consonant_blends_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/34222659702.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/aromaterapia_para_ansiedade.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/84439868414.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/20635352938.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/30973100163.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/parachute_or_brooklinen_linen_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/answer_diversity_interview_question.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/landforms_in_florida_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/73764451478.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/gatulutotuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/xeginigajofanipuwif.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/986759615.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/aida64_serial_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338eb7d4-fa34-4b85-9ef5-612d928c03e5/26575540868.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_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5364 bytes
SHA-256: 5efb53c6df35072fcca03ccc1d170dea475e221d5583941cbdc74f586cd8461c
font_01_sfnt_off00010004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10004 11928 bytes
SHA-256: d1edd9503e103813300e353602eeee15d30383f97f159118bd67c4480fd40e94
font_02_sfnt_off00012711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12711 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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