Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4ab7d2fc66d2a4…

MALICIOUS

PDF

88.5 KB Created: 2021-03-20 20:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f92a4f3cd233a0061d389759061d50b4 SHA-1: bbf362975cbc8bf212b2f9ab910eaadbe49bea97 SHA-256: 0d4ab7d2fc66d2a4ec9abbd43366fea07265c43f413c35743fa5971160b0f14a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several heuristics indicating malicious redirector links and link farming on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to malicious sites.

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
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=que+es+una+traduccion+certificada In PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jbgdqxj/37809736493.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/liagcDs/rugowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5fe76a1d896c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_5ff10ffe5cea4.pdfIn PDF document text
    • http://shimano-stradic.ru/522067089864vxqf.pdfIn PDF document text
    • http://blog-uniswap.org/arduino_servo_datasheetjp8f6.pdfIn PDF document text
    • https://cdn.sqhk.co/zutomina/hghdOoZ/coin_master_tipps_und_cheats_2019.pdfIn PDF document text
    • https://finoritibad.weebly.com/uploads/1/3/4/4/134468058/kazugurisovazo.pdfIn PDF document text
    • http://islta.fun/73554536162rzhy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_6000e88d56d43.pdfIn PDF document text
    • http://gakebapenabe.iblogger.org/cheat_engine_for_pc_uptodown.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/6267532.pdfIn PDF document text
    • https://lixudovu.weebly.com/uploads/1/3/4/5/134598000/58ca0.pdfIn PDF document text
    • https://vafumesaz.weebly.com/uploads/1/3/4/5/134589630/sikar_zifakipapazi.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
    • http://nesitojogosew.epizy.com/2430866574.pdfIn PDF document text
    • http://webexopate.rf.gd/68830946579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a71180-e4ae-43af-9ae6-70f4222376c8/dikarumuvazukelutisekuvob.pdfIn PDF document text
    • http://nogogesusuwebob.epizy.com/jivixanazowororizegi.pdfIn PDF document text
    • http://vutaxinasiva.epizy.com/ziregupodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c328a162-bc55-43f3-998b-ca3308134f15/dekekuginotozedezunuja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2D 4924 bytes
SHA-256: d3d2b40b9a9e4e78728050a9d04cb190dd0612f8793cfa94d98a97ef7bea91b9
font_01_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 13008 bytes
SHA-256: cbcb321db9df11cf0ca93c2ac4a09ef0a66a2e8fb6026f10108aae2f9d3d6e92
font_02_sfnt_off00014549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14549 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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