Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb1cde7980c5877…

MALICIOUS

PDF

70.6 KB Created: 2021-02-17 00:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ca6e23cbfa54684eb322395236b54396 SHA-1: b29fcebf4d9b5c499d9233fa040476ce870bfa2e SHA-256: abb1cde7980c5877ba261ff6e00a410825d6c8f49d8d92df12e2657ffb113eea
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one primary URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=kerbal+space+program+2+trailer+song PDF link annotation
    • https://cdn.sqhk.co/modonasuje/bha0M3O/stickers_de_naruto_para_telegram.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/DL3g7id/73381854073.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/sikewoj.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/nfhajd9/robupun.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/5518585.pdfIn PDF document text
    • https://furimubabo.weebly.com/uploads/1/3/1/8/131856330/4974553.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/dovilupiwif.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/1siBCa2/85635857449.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/0609cc290c9a.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/fhabzXe/md_acne_reviews_face_mask.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/6941218.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/a4a495da970af.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/laginekux/92517061557.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/code_format_in_phpstorm.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/mazilitumominukejowativ.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/38384099067.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/3025422059.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/manonofikumedunijixoviti.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/divisibility_rules_worksheet_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bizejufafiroxolupemuluba.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_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5496 bytes
SHA-256: 2627b302fdde75c731d443e667824289cb2f2a7b300ed581c4af498e0f56ea2d
font_01_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10548 bytes
SHA-256: 824f43254e9c31d55f0c116cd5b1c27c05a50d2befa6e3802fe04a23bb453f63

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