Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb65adb0c70399e9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-20 22:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6fa8cb0fab83e1589c8366f9a87297ac SHA-1: c00f9520ed443a2b6f2e4ccf170737fb8c177549 SHA-256: eb65adb0c70399e9adc5aff09617502b6a44252136284badb9c4701fcf46f1c0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/strik?utm_term=the+ugly+american+pdf PDF link annotation
    • https://cdn.sqhk.co/vidujubotaf/iaifgds/clutch_escape_from_the_prison_planet_lyrics_meaning.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/557146.pdfIn PDF document text
    • https://sizofepetawun.weebly.com/uploads/1/3/6/0/136087679/35f1860ad350022.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/gLgYguw/lyrica_generic_side_effects.pdfIn PDF document text
    • http://frasqen.online/kirolovixijej6l6h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480182/normal_6006779a74835.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/6682305.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/Cjfgejc/80523433264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff4b654363f5.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/xagobanowur_pepop_fabudesapirawur.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/3c51b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5fca67a4cb988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_6023b96e963e7.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/hfRgeib/paint_by_number_color_games_app_store.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/muvemasoxaji/maintenance_review_board_report_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/career_paths_computing_express_publishing.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 5440 bytes
SHA-256: 17493c5718f4e40df10b76519e601ccde5ff2a417469e659f9cbb0f7cd67993d
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10816 bytes
SHA-256: 43901a2b1b723aa169bb719fcb1f990feb5e55659feb66882d82a62c51f870ec

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