Malicious PDF — malware analysis report

Static analysis result for SHA-256 62caa3d5e7796c8b…

MALICIOUS

PDF

83.6 KB Created: 2021-03-25 07:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e3d307d54088a6737a643e5abb8cee23 SHA-1: 8749c82c7e6f18347a71c0d0142e10bf3efc12e4 SHA-256: 62caa3d5e7796c8b6c2d64ad54c403eae508870e0aacb0b633dc881b95d2b239
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://xajibur.ru/wix?keyword=mortal+kombat+x+android+hack+apk PDF link annotation
    • https://cdn.sqhk.co/nebinefis/ggji3jb/41778170136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5fdb92e1edb48.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/fjejehe/ratelilewo.pdfIn PDF document text
    • http://alex-chekalev.com/sawesejipetovejugixuwas7ydc.pdfIn PDF document text
    • http://prodit.space/37769693095p1nem.pdfIn PDF document text
    • http://tihefers.online/hormann_supramatic_e_remote_programmingr6c6r.pdfIn PDF document text
    • http://verifybadgehelp.com/arch_linux_yay_guidebsqp0.pdfIn PDF document text
    • http://ideal-it.fun/dibibogejarakelejovvpkr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_604146a69cb74.pdfIn PDF document text
    • http://canonsburglake.org/nuwulemoredabupawegezfg0.pdfIn PDF document text
    • http://usesucre.pro/479963816962gv5b.pdfIn PDF document text
    • http://supermagazforsale1.xyz/lumadaksnuqo.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/idtghje/tabejezefafamaxinas.pdfIn PDF document text
    • http://magic-spring.com/wiwozujisonosuboj9sj35.pdfIn PDF document text
    • http://gatorama.space/denudipivovowepebagisajobqubmh.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/jhicGii/zodidorasawan.pdfIn PDF document text
    • http://podcard2020.site/how_can_i_learn_arabic_fast_online_for_freeu59j8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_33c1978c74be4cbabc6e9cfc428aa421.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_eeb81effd1cb48a2afdc027ed0701c57.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_8930d0b804f54fa29dec4a9b8abda712.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_58f9b94b37a6414a8016aa7440d8664e.pdf?index=trueIn 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_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 5412 bytes
SHA-256: 767a924907e746a4922f73db601a0299a77e952499e06c5a2448b9929f3ff2c3
font_01_sfnt_off00011c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9C 10580 bytes
SHA-256: 34c16bc739883143c2c9d5b0764335d4882fa9208233a543f00ddd97ca04e3f0

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