Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f6b4be753d2ee6…

MALICIOUS

PDF

70.0 KB Created: 2021-05-05 10:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6bb3e5ebf7694d6192880a5f5ccc4b2c SHA-1: 5c5ad5ec5ad60da43976a66aa79b481a0d1d8869 SHA-256: 74f6b4be753d2ee6d6c3a5451355e47d7071875080876bee0fb6e9320d5c6682
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 pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=bayford+padded+coach+jacket PDF link annotation
    • http://retenenu.iblogger.org/fresh_off_the_boat_season_3_episode_7_the_office_tv_show.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/eKE4geF/tijol.pdfIn PDF document text
    • http://balifruit.com/pilgrim_at_tinker_creek_audiobook_freeyx8zr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_6022c2e06baed.pdfIn PDF document text
    • http://dakejexisumupok.iblogger.org/philosophy_basics.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/VibHegf/nintendo_switch_online_family_plan_upgrade.pdfIn PDF document text
    • http://startask.ru/75913523789l9561.pdfIn PDF document text
    • https://cdn.sqhk.co/dokederajo/kwVyXEJ/charles_law_worksheet_answer_key_page_21.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/hbgcxpv/dajepufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_6054e439e77c2.pdfIn PDF document text
    • http://igcopyrightverify.com/how_many_hours_preparation_for_gmatc3hzk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retinibefefemo.rf.gd/increase_3g_internet_speed_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/4675622890.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/46279810252.pdfIn PDF document text
    • http://didaduxazej.epizy.com/how_to_improve_your_max_push_ups.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_a1d4f9fb95ba4d59a11f25255055409f.pdf?index=trueIn PDF document text
    • http://zuwewabarabin.epizy.com/what_is_the_series_of_harry_potter_movies.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_a5458c26ec9943ff906b9ae37d8ac64e.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_f2ed4d9be74d4c7fa07e06c12121cfcf.pdf?index=trueIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_a576122f24f44239b654d672a5d011b3.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_54849525c2c049f2b92edbacb7f2d03e.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_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 5324 bytes
SHA-256: 6db575d9cfa35b6e3907463cdcbae026e4b9b373fcfa6c49b64254bf07618b1d
font_01_sfnt_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 10468 bytes
SHA-256: 24ae932423f91e5d136e3a1d0c023d2e270bf8ffd5af440f98beee64cd34bce9

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