Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f4198b68b129ab…

MALICIOUS

PDF

76.5 KB Created: 2021-03-06 04:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ba6a13590999d53396f8e4bf3c52c3d5 SHA-1: faddbc270ec741b19e7650b7681d0594a47bfa75 SHA-256: 45f4198b68b129ab8c825ac1012d45d7bd5a92c6b80b6e14891ff7efab2a0922
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to unknown or disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

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://mezovuduw.ru/wix?keyword=how+do+you+party+chat+in+hypixel PDF link annotation
    • http://verefdliyvtorogo.xyz/black_and_tan_siberian_huskyvcg4o.pdfIn PDF document text
    • http://instapriz365.online/samsung_bd-j5100_remote_not_working1c9ce.pdfIn PDF document text
    • http://brightshopbg.xyz/que_es_propuesta_de_valor_brainlyy4t80.pdfIn PDF document text
    • http://shoop-fr.ru/adobe_premiere_pro_cc_2020_free_download_with_crack3820r.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/3259731.pdfIn PDF document text
    • http://chambrehq.xyz/ewi_5000_sound_editor_manual80wiu.pdfIn PDF document text
    • http://ridunculus.com/classical_guitar_lessons_for_adults_near_meri47u.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/7412655.pdfIn PDF document text
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/gixowelatenotetub.pdfIn PDF document text
    • http://newyearshop.site/dj_song_name_app_downloadveebf.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/66aa6fe1-f05b-4dd9-89d9-0a334f80503c/english_grammar_exercises_cloze_test.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_e2db3db7f8d544d4a6eb8bd02ee2478d.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_21baed3d6cc24ea78526a70995c7e104.pdf?index=trueIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_5480b3162fff41efa8932ca6a4a0b4d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f30ee9f-62f0-4358-b123-83db8c9ebef9/mtv_challenge_inferno_2_full_episodes.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_68b2b1a1ebf846329edcf745b73c7c9f.pdf?index=trueIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_bb9dd502c2d14ec9955a0b51234700cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23f54ae-ed32-4872-a8d0-55e486e03ea8/how_to_turn_on_philips_gogear_vibe_4gb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7247a7-c51d-46cd-ba52-3e4ac7189556/los_tipos_de_comunicacin_verbal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d941654a-7e3b-431c-9104-483d47ad338d/24491091618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea4aaca-4f0e-459b-9d5f-c85438773d11/nepapirenevoxozuzufizij.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_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 5208 bytes
SHA-256: 8557cf8be1c600059e6e3d255332154351014217342d8d8b949b83a97f864317
font_01_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 12776 bytes
SHA-256: 2dc3b4cf045cd9b43ccb806ce514727f062c81c3d1668ad1857631a2a34d6365