Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56f94cb797d0cd6…

MALICIOUS

PDF

68.8 KB Created: 2020-12-23 12:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 126662b88bab72d97248d832a75a1f0e SHA-1: d0d8ba82952831dab75de188a315424d7c573b21 SHA-256: f56f94cb797d0cd68bf19b6819722359c7b41b987f84aaada5dfb282832a6e9a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or scam attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the document, likely serving as a lure to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=siblings+family+tree+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460071/normal_5fa98ef46be05.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/sabokorujise.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/a7716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5f8b792315e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5fa72ad1d08d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5f90ff7e79699.pdfIn PDF document text
    • https://fimagokuzite.weebly.com/uploads/1/3/4/6/134681622/1839280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fc4bba43570fb44d1982a8a/1606728613352/queer_a_graphic_history_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe2eecde65b0669990719f8/t/5fe2f9434aff1019af4b5e34/1608710469020/7_day_sugar_detox_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34985239b07229140aab6/t/5fcdc3c5662d5e24e0c28e03/1607320517610/sword_art_online_game_ps4_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35270bdb33045eed1c2ec/t/5fc8d4d96652ad59ec32b80e/1606997209805/pepojulemuzupafurisitep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13ce6b9c87d07fa023544/t/5fe155682eddad3b374cc541/1608602985020/zenedubunapawiloxezifida.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc777effc603311fbfa8080/t/5fcbfb33e43f2b00a892b1fc/1607203635379/spinner_fidget_toy_metal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a2258787e879898c1ebf/t/5fc9e451ec1d586fb38fb38e/1607066708487/hay_day_cheats_2020_deutsch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd539cc66bff209e8009b6/t/5fdd9feefb7de13a64475a9e/1608359919241/zudumulubu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59b7d2cf09257bd8b9178/t/5fc9a7dbcf87d0256fe8cbba/1607051228621/gizuliriwukorodipoligalep.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_off0000d0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D6 5568 bytes
SHA-256: 4293db6c099e53865d2a864a70163d55980185d8ff763739ae57ca554b70782d
font_01_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 10200 bytes
SHA-256: af97ec05d53895dd065612f5445920de2294fa9ede1003d4eb7e02d22c0f13db

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