Malicious PDF — malware analysis report

Static analysis result for SHA-256 a394968a35ef6eb6…

MALICIOUS

PDF

85.7 KB Created: 2021-04-01 00:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 371f366eaa5e0a021e3078c593962e44 SHA-1: 56965c98d06c9e79bfae1af9384e1259a8e0911c SHA-256: a394968a35ef6eb6dc4fb357ba33ee6b805c102cf64abcc88589f02802c8431b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of numerous URLs, including those on potentially malicious domains like 'life-news.tech' and 'my-favshopc.online', supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/strik?utm_term=berklee+guitar+method+2+pdf PDF link annotation
    • http://life-news.tech/brookstone_big_blue_party_speaker_price6vmjw.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/gggdxCc/react_testing_library_drag_and_drop.pdfIn PDF document text
    • http://my-favshopc.online/weketezilomipuvazawejavmku.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/5830156.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/PnFJhfn/ice_fever_pinball_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/gjb3v0X/reversion_definition_oxford.pdfIn PDF document text
    • https://cdn.sqhk.co/fijiwomeza/SjighXV/mirazasesobepoperesew.pdfIn PDF document text
    • http://center-about.com/plant_design_and_economics_for_chemical_engineers_5th_edition_slidesharethkxz.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/gjjMjjv/roku_tv_deals_black_friday_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/1shfdM6/draughtsmanship_definition_synonyms.pdfIn PDF document text
    • https://kagejiwuj.weebly.com/uploads/1/3/4/0/134095923/5c5f28b805.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/cieijhj/70146172167.pdfIn PDF document text
    • http://repair-monokoles.ru/692543518916qtdw.pdfIn PDF document text
    • http://spencermcman.us/cairo_tourist_map7auzh.pdfIn PDF document text
    • http://cuzinfo.ru/659982149167gs3h.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/gfDKijV/kawaii_bunny_wallpaper_hd_food.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
    • https://s3.amazonaws.com/tikoweravisixu/kusezuresafadiduze.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/sarkari_result_chsl_answer_key_2019.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_off000101aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 5296 bytes
SHA-256: 8b1a6f5e139f189a8a643c0dafde9c3ff58d2178ca9c4edea61f582e79e36b37
font_01_sfnt_off000113b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B7 11148 bytes
SHA-256: 481578dbfebce882080ff209e2c0e8279a2d5d5dbf8370699f8c2c74d52a04be
font_02_sfnt_off000139ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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