Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5c3a19a7ad5a9e…

MALICIOUS

PDF

73.6 KB Created: 2021-02-27 00:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c603c68182401c838a9cbb33399a9275 SHA-1: 232bc8d26222bc135c87030aa67a283a74539d42 SHA-256: db5c3a19a7ad5a9e6a2392de69af5a72482ab6167397cc5d62983483a4426ef4
186 Risk Score

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-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://leonvi.ru/123?utm_term=how+to+ignore+my+best+friend PDF link annotation
    • http://cosmostil.top/zasenexaxomofipalazajzc4m.pdfIn PDF document text
    • http://lizetadolanut.iblogger.org/40569015548.pdfIn PDF document text
    • http://tevfikyuce.xyz/denver_gem_and_mineral_show_2020_coliseumntrqu.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/lk5jhA6/moneygram_stock_price_today.pdfIn PDF document text
    • http://senogibe.iblogger.org/fitted_sheet_queen_extra_length.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/dUTYhjK/two_points_that_are_noncollinear.pdfIn PDF document text
    • http://servicesforsupport.com/call_od_duty_4_key_codec10he.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/bJghtp3/cooking_fever_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/3k04R4A/guns_n_glory_zombies_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/jaUjeU6/wotekovi.pdfIn PDF document text
    • https://wopinifem.weebly.com/uploads/1/3/4/8/134884590/8912465.pdfIn PDF document text
    • https://sezavifibeka.weebly.com/uploads/1/3/4/4/134463458/5abaa78e6cae7d.pdfIn PDF document text
    • https://todulatewex.weebly.com/uploads/1/3/0/7/130738789/bewimixonap-lawelovodipubud-mapevimope-lukewub.pdfIn PDF document text
    • http://kaxazul.iblogger.org/rulewamelinukobewin.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/zifiaja/stickman_and_gun2_mod_apk_1._0_9.pdfIn PDF document text
    • http://tgesheff.xyz/resufapadovaludekekidiligewd3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofowizo.epizy.com/sex_education_season_3_netflix_nz.pdfIn PDF document text
    • http://nolumuj.epizy.com/reviews_on_maytag_5.2_washer.pdfIn PDF document text
    • http://vonolukover.epizy.com/vixikaxedavemopum.pdfIn PDF document text
    • http://dafoxep.rf.gd/71610543334.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_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 5280 bytes
SHA-256: 5ee90c5f524027e2a9c924f5009174284251137f62d36e4aca5e27eeacff7749
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 10184 bytes
SHA-256: c3e65eab9c6182147b52d2b495c14e069df5bde3585ea923b591be7d808bec22

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