Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc43859a5b8bba5…

MALICIOUS

PDF

124.7 KB Created: 2021-03-22 04:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 617654e433ce560c66fbd2438257555f SHA-1: 040df4c857d64bf5a82196f5364feed4de20a7b2 SHA-256: ccc43859a5b8bba52d7286e30fb7186a15ecd22ba659f8e425e1e91d51270c4a
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=where+to+buy+greek+language+books PDF link annotation
    • https://cdn.sqhk.co/nowavutu/fhiojab/complete_guide_to_home_electrical_wiring.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/fjiVc9U/combat_duty_modern_strike_fps_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/jjjj7cU/zilebix.pdfIn PDF document text
    • https://fisuvinu.weebly.com/uploads/1/3/4/4/134497747/7110975.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/essay_examples_for_6th_grade.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/what_is_the_distance_between_the_equator_and_tropic_of_cancer.pdfIn PDF document text
    • https://cdn.sqhk.co/buwisotubu/5Mehdhi/lofijukutonemu.pdfIn PDF document text
    • https://nipogoloduvi.weebly.com/uploads/1/3/4/3/134368022/dopinikuroxa.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/ihhhthc/the_walking_dead_season_8_episode_18.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/S8tjgn2/makizigagavopovolop.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/pudozaxirakobezoze.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/gQLsyjc/ruzika.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/iDbovvU/ralphs_hours_burbank_blvd.pdfIn PDF document text
    • https://cdn.sqhk.co/mewovegid/ihhOyg0/zapazatavewofokawaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/sjfjeij/47711651015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_6b7bfda687df4958ae7757fb2cb425b3.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_fc4764072ea14a11879c80a352c72bd3.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_33814f01a8974e8283cdc2963368b182.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_074ae59f355947d98c593c38e9a597c9.pdf?index=trueIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_04c6c58870ce4ba7a6002d1a35af4835.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_0299db04610c48bc83ce04d1c52aaa3c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B48 5264 bytes
SHA-256: b54dd64fd932baccd1f37d71a984018b790c466cee34b46207a5047e699f919f
font_01_sfnt_off0001ad45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD45 18436 bytes
SHA-256: 9050f1c80e953fd026867140e262d7d07c6c473503f38ab6acd79753dbe3710e