Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7cab26b58130248…

MALICIOUS

PDF

80.5 KB Created: 2021-02-28 02:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68bb9e8e9dea1788ea7c2091a6dc51e SHA-1: 4e82143cbabc75fd707a8d6febfd4242b149020b SHA-256: d7cab26b58130248a0c99b0f37d7064f8e2c3fe8c7d7ecdb98522b34c2f2add7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and directing users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://resalured.ru/wix?keyword=fitbit.com%252Fsetup+manual+alta', suggest a phishing or credential harvesting attempt by impersonating legitimate services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=fitbit.com%252Fsetup+manual+alta
    • https://zububeto.weebly.com/uploads/1/3/6/0/136082076/sudagavasa.pdf
    • http://sportplays.ru/pokemon_quest_legendary_guidehqg1k.pdf
    • http://theharaka.online/the_reach_stephen_king0p1s2.pdf
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/7971068.pdf
    • https://toposizijud.weebly.com/uploads/1/3/0/7/130776562/51b62abb.pdf
    • https://damuduwanilew.weebly.com/uploads/1/3/4/4/134477354/nejef.pdf
    • http://busforpay.online/anualidades_diferidas_ejemplos9fi6a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woneketelak/automatismo_mental_paranoia.pdf
    • https://s3.amazonaws.com/joterige/information_asymmetry_theory_in_accounting.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/chernobyl_hbo_openload.pdf
    • https://s3.amazonaws.com/mefadedosuw/zakokizokade.pdf
    • https://s3.amazonaws.com/fenatagazise/dofowifajamevizupud.pdf
    • http://namakanexir.atwebpages.com/how_to_service_trojan_golf_cart_batteries.pdf
    • https://s3.amazonaws.com/zarusegibitumet/rifasomux.pdf
    • https://s3.amazonaws.com/pasawexawinogad/mitonomalomiwigele.pdf
    • https://s3.amazonaws.com/tedowafomaru/the_true_story_of_the_three_little_pigs_summary.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010054.bin
910bd51b133f4b16032630b4dbdf9e92d1a49402abe3720b98d0cd168b299aef
pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 5144 bytes
font_01_sfnt_off000111d1.bin
a579278bd053a7d0bc9e8959e0d9e1f94da2ac33d3a5b1e1cc0f9acf276da7f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 10164 bytes