Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0683cd9b2baaf86…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 21:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 909fd6f1a00b5a78f886a693190bb624 SHA-1: e74af3dbd8968d0c6ffff3bd55d84447216ffb60 SHA-256: d0683cd9b2baaf869014bddf516ddc252f47a9c21130c6841b8c5b237f7ca60e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=abdomen+agudo+quirurgico+pediatrico+pdf PDF link annotation
    • http://pikowomaxuden.iblogger.org/xofirarurefa.pdfIn PDF document text
    • http://movikikigemalo.iblogger.org/business_process_optimization_arlbjrn.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/etutxTW/flaming_core_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/iwlbQlt/big_bang_evolution_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/jgBjgye/35355192073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_f6ed5802c6284d3ba49def30e2294f51.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_07850a4ec77245bb84aca87efc991f2b.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_eeb8a52509f5476ea6550e7c57ff64f0.pdf?index=trueIn PDF document text
    • http://dafunidubavilo.rf.gd/chess_brilliancy.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_9ec49cecb3eb44d3b98ceb6901e28e36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e03ee2-97af-4fe0-b06d-420b960712cd/lg_ptac_error_code_ch_07.pdfIn PDF document text
    • http://fipivolakiwupod.rf.gd/64511481397.pdfIn PDF document text
    • http://xirotowukutizu.epizy.com/samomefafomunalerisajef.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/givunenonilumomuwexaxip.pdfIn PDF document text
    • http://lusiromipu.epizy.com/nefobomititewuxuwuju.pdfIn PDF document text
    • http://janosunitemixe.epizy.com/tozuzufomebegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ddf973-e1c8-4bdb-99d4-70195ec90c47/harbor_breeze_fan_remote_dip_switch_settings.pdfIn PDF document text
    • http://sumojoripira.rf.gd/xadarisidinow.pdfIn PDF document text
    • http://sinamupom.epizy.com/46130420551.pdfIn PDF document text
    • http://lopovimefadepom.epizy.com/kurt_vonnegut_short_stories_summary.pdfIn PDF document text
    • http://xumizimewimapa.epizy.com/21795622708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1357126a-5f6d-4cf5-b6fb-ccf8b59ba641/42084251797.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_d9ee92fc59b04b5e94afbf794b7a3b1f.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_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 5520 bytes
SHA-256: 73d33e699e94937d2663af2c2ba5cc21070b6b69c0c34ed0e0558277d8a46e46
font_01_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 11696 bytes
SHA-256: 6ba89da874b12b74580386e36e9c407e139d0b66c6dd91c52ec4798085d8d22b

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