Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ad998a3b94f2a3…

MALICIOUS

PDF

82.8 KB Created: 2021-04-01 18:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 017ef54ba806fefaf8f533ae93038759 SHA-1: 585c83143ec8ea037f9ee56408b8d26293dace4c SHA-256: 34ad998a3b94f2a38d2904b1504c5f1ad0cc168987b7b443dc0a2540602ffa0e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to malicious or deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/award?keyword=us+amendments+pdf PDF link annotation
    • https://cdn.sqhk.co/nuvaratuji/aHnWJ1u/king_s_raid_tier_list_altema.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/dWhg5hb/python_3_string_concatenation_performance.pdfIn PDF document text
    • http://rijuwutosepirol.iblogger.org/what_are_the_services_provided_by_wipro.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/d1f72.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/fidhhTw/38150899289.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ngiUqhd/godapajojunatugidiv.pdfIn PDF document text
    • https://cdn.sqhk.co/pexudolifa/gcibihd/muvomipasoxefi.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/vibiccV/39140083413.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/hehhibT/emoji_craft_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xupotuferu/BehaEPb/1485507611.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/37d7753.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/d7gcgeY/26943510367.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/Kgejgqf/wood_turning_class.pdfIn PDF document text
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/suguket.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/ii07dic/68184020629.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/ggicylm/adt_pulse_not_working_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae907867-7675-42d8-b9fb-992dac42e586/pokametajinisevejorifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf751b6-550f-497e-a1c4-381681948893/zusaramijufesem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9538b85b-ef7c-4b9a-8aff-3662886ab929/bapowuxerawovimamojipani.pdfIn PDF document text
    • http://nipufafinera.epizy.com/instagram_followers_app_android.pdfIn PDF document text
    • http://sidiwen.epizy.com/maniac-_2005_full_movie_free.pdfIn PDF document text
    • http://vixezazemezox.epizy.com/aashiqui_2_tamil_song_video.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_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 5052 bytes
SHA-256: 330ae7c2dbdd15469e410f96e89ab28eb696e9c8caa74840168bb27c869d5af4
font_01_sfnt_off00011a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 10504 bytes
SHA-256: 934aa45573b3ce1ad89d0f7b6720bf50065ab871478749061c477d028cd93f84