Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e54a52ed7e50800…

MALICIOUS

PDF

89.7 KB Created: 2021-03-13 21:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d053ba1da6936c0499aeaad962d63c4 SHA-1: 7b1d69a9b7efdf125e7aed4ae10b4196ec77faa9 SHA-256: 1e54a52ed7e508003a9c12003bef311cec11a2ec87648be283a6fab54dda94eb
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 spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites, possibly for further exploitation or credential harvesting.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=tera+sorcerer+glyphs+guide
    • http://detonic-buy.website/fovoxupezezijiuqkp2.pdf
    • http://poverkavoda.website/445993912018cx3u.pdf
    • http://fajamad.mypressonline.com/famous_architectural_buildings_and_their_architects.pdf
    • http://lnstagramverifiedbadge-media.com/133501954837zgco.pdf
    • http://akfb.online/retro_wallpaper_computer4cxov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_07d85c44d59f440abdfd377ee409e365.pdf?index=true
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_62c8158fc00d4769bf03f35d7ad4de3e.pdf?index=true
    • https://s3.amazonaws.com/pegebunov/81386894125.pdf
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_d730a205cb4a402d89d87929cef48213.pdf?index=true
    • https://s3.amazonaws.com/lemefofutomapox/alien_vs_predator_evolution_full_apk.pdf
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_f7e9b9a4b1ef4545b49bb53523f53ac8.pdf?index=true
    • https://s3.amazonaws.com/nafoxuda/jowijipiwamixeverafupaxo.pdf
    • https://s3.amazonaws.com/jixerubowi/neet_2020_syllabus_by_nta.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/4032686835.pdf
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_c645496e2df041e58109a31dc4f5a453.pdf?index=true
    • https://s3.amazonaws.com/kufazete/wobuvizekatetekawiwenolo.pdf
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_4cda01b4bda148dfbc6af1c84b517ba9.pdf?index=true
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_32dc4b8fbc4944bbafd20ba10e6d455b.pdf?index=true
    • http://sogivuwe.onlinewebshop.net/wiboremitasapototuviro.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_off0001218b.bin
890e066fdaee42135c144fd19457601cf22999fa91880d61b4de9ebdc004036c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 5388 bytes
font_01_sfnt_off000133d7.bin
3baf0c9a1eb714f9d335ade9000b978331b7da07b542b7a60b185f491801240d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133D7 11172 bytes

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