Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fe29fdd11d2f52…

MALICIOUS

PDF

80.6 KB Created: 2021-05-16 13:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2252575ed2c5fe14fcae620224c23ac0 SHA-1: 4338d232509028771a12a529a1bafd36b9fd8201 SHA-256: 08fe29fdd11d2f52a3d61f7d4926fe4183a44b86d1e0e549209a3d03ec3808c7
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 or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. The embedded URLs and the nature of the link farm point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=do+resistance+bands+work+for+glutes+reddit PDF link annotation
    • https://cdn.sqhk.co/tivanosox/bgiYCzU/98588587125.pdfIn PDF document text
    • https://defonufagij.weebly.com/uploads/1/3/4/3/134360363/6327733.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/hjhmZQm/ralphs_pharmacy_sherman_way.pdfIn PDF document text
    • https://xomadugazulu.weebly.com/uploads/1/3/4/5/134597447/9722531.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/Oic6Ugh/86860817208.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/sofoka-vapoxufaxujapu.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/ic0kJmL/drive_safe_and_save_mobile_app_review.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/fijexexewo.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/icdgc3h/sudoku_hard_puzzle_book.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/keggieR/adda247_app_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/jusigexovoz/XQhd3Si/44752488573.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/hhWXrgm/games_like_emperor_and_beauties.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/Ciazjea/86207170960.pdfIn PDF document text
    • http://zupanito.iblogger.org/calculus_made_easy_silvanus.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/pHhiji4/ants_go_marching_song_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/iejeq4I/pezejirexomuditaranusirov.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/jinhijc/dead_trigger_2_online_free_play.pdfIn PDF document text
    • https://gufogirim.weebly.com/uploads/1/3/5/9/135967500/najufamutusa_bixewifaxelasaj_tovudado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugipapilit.rf.gd/numerical_and_statistical_methods_techmax.pdfIn PDF document text
    • http://kokalukavevip.epizy.com/maliwurisaw.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_40443a54557241388773beb24283547b.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_133c85dc796d4a8ba3a34d74b1695663.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_6c3061515fde4da6a70b2a266f0531a8.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_566a349753cb4bbda37c54bf9c698d73.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 5484 bytes
SHA-256: bafe9bdb6bb62dc33e46d7aa91d73fbbf9455dc930032e49ebac08c26f209beb
font_01_sfnt_off000103f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F3 2276 bytes
SHA-256: 49e3464b9bd7adf64bef193936c7ecc8e2583bcaebe603cd7647c7daaebb3533
font_02_sfnt_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 10580 bytes
SHA-256: bd4985ebe043d98de70d71835bfe9fb4dbb5eb92d277e41da07d8aa805c50a1a