Malicious PDF — malware analysis report

Static analysis result for SHA-256 6771b4f625613c0b…

MALICIOUS

PDF

75.6 KB Created: 2021-02-05 20:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4663145e43c17742e1cef8b07be0b899 SHA-1: 5327a45c46a3fef15f402b02cd04e2cec3e3f9e7 SHA-256: 6771b4f625613c0b3c4f58e423d15dd2b43f908d32023e0576c3de98d56baac0
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URIs suggests the document's purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=plan+b+inside+pregnancy+test PDF link annotation
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/eb4eb29b20e.pdfIn PDF document text
    • http://50offshop.pro/puwevoxeleteyn3bo.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/naxaxoterosatatasu.pdfIn PDF document text
    • http://pitushok.space/zerojigofaroredanasazusnk73t.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/kipubori-wodoka.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/yJhh7YN/naxulupobenefigegemu.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/6280731.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/pobusu-sosutevenabeki-xetivuze-josase.pdfIn PDF document text
    • https://nudilosi.weebly.com/uploads/1/3/4/5/134527742/464bc83e.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/8BjajcA/blade_and_soul_force_master_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/Ddaighf/captions_for_instagram_pictures_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/dgghd7p/wazorowenako.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/monagedakiz_somomojugeb_rakudov.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/hot_wheels_unlimited_triple_loopi631v.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/zisimigi.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/lofumuzuzixakaf.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/aYkOw24/friday_night_multiplayer_survival_horror_games_ps4.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/lukepepe/galvanised_metal_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/letter_of_completion_for_ojt_students_template.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/pawogogadirokerexofalaf.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_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 5160 bytes
SHA-256: c5cd151f2b476bca171a76d16fc9a3fd4ba74c5e1e47a0f1ad7082cf499bb694
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 10396 bytes
SHA-256: cc48754bfe4268c7a1d50e78b55db3f6c63f89fbf00651ae4f003071761434b5
font_02_sfnt_off000112c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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