Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b93c7e67c4cb7b…

MALICIOUS

PDF

80.4 KB Created: 2021-03-06 04:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 44ebe6b20cf5145eeb837da7778e734b SHA-1: 5be490257b0765e9445af4136ab292451b571b3c SHA-256: 94b93c7e67c4cb7b70b195be184dfc9fe70a6921004bffe5f026908b7265785f
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, http://christinaanddavid2019.com/seseta9m080.pdf, is particularly suspicious as it appears to be part of a link farm. The ClamAV detection and ML classifier also indicate maliciousness, with the ClamAV signature suggesting a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/aws?utm_term=is+insignia+a+good+tv+for+gaming PDF link annotation
    • http://christinaanddavid2019.com/seseta9m080.pdfIn PDF document text
    • http://chelobaka.space/integral_quantum_hall_effectfwi6r.pdfIn PDF document text
    • https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/5974355.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/sagunewunidojife.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/legepoxiwuwa.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/sabegokek/oracle_erp_apps_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/crowdsource_funding_platforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2331b6dc-4af5-4bb0-b258-7890ca3b3980/ademco_vista_15p_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/55599281660.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/tifubejomilipumuludeku.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/33904232057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fb026f-62b4-4184-8194-bd12aa1f3a96/wumive.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/aladdin_song_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/boxster_987_buyers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/26856532721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a81846-07d0-422c-8966-63eba46665ca/4_social_media_zones.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/adtran_modem_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/34975101877.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/canon_eos_rebel_xs_film_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/44809715263.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/9983257828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3220b32-f899-45ef-9a14-94ab84dc7fe4/narrative_of_the_life_of_frederick_douglass_chapter_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/49061124117.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/tefizogufivet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11C 4860 bytes
SHA-256: 39163b556e5fc81e9a7e17c44d640023c53ec61aa386d191278469df6950947f
font_01_sfnt_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 10812 bytes
SHA-256: bde61ee89e7001ba75db5cecee58ff8eb32eeab67aa30ed168d0111d12221375
font_02_sfnt_off00012589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12589 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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