Malicious PDF — malware analysis report

Static analysis result for SHA-256 040a4caad1eac58a…

MALICIOUS

PDF

79.2 KB Created: 2021-04-02 02:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a9d81af73d68c5d6eed06924f6394076 SHA-1: 7d06155e462b26cbb4bc6c11d34f5ef6c382c300 SHA-256: 040a4caad1eac58abb7a3714c695369741d41ab6a9318b3ef53875ea0d378391
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the lure of a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://golowaki.ru/strik?utm_term=bissell+pet+stain+eraser+powerbrush+reviews PDF link annotation
    • http://airbin.top/how_do_i_connect_my_netgear_wifi_extender_without_wps_buttondq53r.pdfIn PDF document text
    • http://abzac.me/your_choice_restaurant_menuw7ht8.pdfIn PDF document text
    • http://paypallsecurity.com/jumekejexubirojobuhd2n1.pdfIn PDF document text
    • http://b4shop.icu/59557761849p4674.pdfIn PDF document text
    • http://frankiearvelo.com/cheap_screen_repair4y2p9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_603f195b836d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_600fd9243cd1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_606185c79beef.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/ijRGjdL/all_feeling_songs_telugu.pdfIn PDF document text
    • http://bt-management.website/54411552661jbn2x.pdfIn PDF document text
    • http://blacklaser.ru/honda_fg110k1at_partseyfwj.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ggghihf/headhunters_io_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_6047f409226e2.pdfIn PDF document text
    • http://begetus11ppz.xyz/86002882020002n8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_601f8fa4164ee.pdfIn PDF document text
    • http://mikrotikwizard.com/31603794378fgozf.pdfIn PDF document text
    • http://phillipen.online/709047832769ag4h.pdfIn PDF document text
    • https://cdn.sqhk.co/merejipofeto/jfSGhga/date_format_string_bash.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/9jiJjgD/under_seat_storage_2018_chevy_silverado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2994b66-3230-442e-ac22-dde5692340e4.filesusr.com/ugd/0182ef_c5c775de48ca46e8b26e2a7e7db46ddc.pdf?index=trueIn PDF document text
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_b653e5c0408f4d548dac94300c1dffd0.pdf?index=trueIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_cda23fd6b69641109586d63972e468c9.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_30bdc325bb6a43af9a9e398eb4a59a4a.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

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_off0000f71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71E 5248 bytes
SHA-256: 170c13582dac5daa84650f8b808abe20d95ca87c66803e3e1658d66cfc7d2d92
font_01_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 10728 bytes
SHA-256: 70cc80327142b9f857394d0bdee8c576ae43f225006b712602c6972890ef5df9

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