Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f7084c3e2e73a3…

MALICIOUS

PDF

82.1 KB Created: 2021-03-03 08:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b455e510d84d28335cb9c51783764456 SHA-1: d6ecb1cdf1d5ae6e179db341327dbb862ef3b839 SHA-256: 11f7084c3e2e73a3f59510ded61c8fc478af9714bb320f677d3cf338e48fcb5c
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to software licenses, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/wix?keyword=ashampoo+burning+studio+12+free+license+key PDF link annotation
    • http://akillidestekbasvuruformu.online/98590423293tjrjn.pdfIn PDF document text
    • http://help-bluebadgecenter.com/simharasi_telugu_video_songsqob63.pdfIn PDF document text
    • http://futup.ru/troy-bilt_21_self_propelled_mower_reviewaxvbh.pdfIn PDF document text
    • http://itali-big.space/khalnayak_mp3_ringtonet9g75.pdfIn PDF document text
    • http://teaitalis.space/97198069797xo9s.pdfIn PDF document text
    • http://copyright-central-media.com/sivewoxixugigutikodow6m1rr.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/xodirudofarobetarasume5xi7g.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/mythic_summon_monster_pathfinder.pdfIn PDF document text
    • http://sokolov.fun/gonigusiburodaon2d4.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/montreal_cognitive_assessment_printable_moca_test.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/39943832813.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/yojejhg/small_dog_light_collar.pdfIn PDF document text
    • http://robertferrell.net/feboriwifujalo95bl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zijivevip/what_companies_are_iso_certified.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/blender_2._8_free.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/samsung_washer_wa40j3000aw_a2_wont_spin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 6048 bytes
SHA-256: 7920f4813f7ab5e9e2ed23c7b20d21b1c22ef69947831784c01ce99fad9cc036
font_01_sfnt_off00011055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11055 13636 bytes
SHA-256: 6e37c1304bc8dbc017a7441256cde0a59ec426e20165cf044e7fd364037374d3

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