Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a26227330c18bc7…

MALICIOUS

PDF

75.6 KB Created: 2021-04-08 17:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0071caea8f715abaa6c1481b23756682 SHA-1: 2b72c44802d62fe681772812c9ab0567d74e52ae SHA-256: 3a26227330c18bc7e9158c8caa5df30802bd95508803d18fa2a1b58da0b27f37
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains text related to printer setup, likely a lure to disguise malicious links. The embedded URLs point to disposable domains and link farms, characteristic of phishing campaigns aiming to redirect users to malicious sites for further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=how+to+connect+hp+laserjet+cp1525nw+to+wifi PDF link annotation
    • http://sixesijilolun.mywebcommunity.org/togefamuwumasuve.pdfIn PDF document text
    • http://dreabling.online/monkey_ball_race_gameqsoi9.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/zesujanuwif.pdfIn PDF document text
    • http://mugedly.xyz/vewuzikegoslzg.pdfIn PDF document text
    • http://abreudesigns.com/singer_306k_manualknhsq.pdfIn PDF document text
    • http://svarka-aurora.online/how_to_make_a_medieval_cloak_pin1o9u2.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/66sgfgi/muwavuzesekubifaxol.pdfIn PDF document text
    • http://carluxepaint.site/66538323730b3mhz.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/gfm8l98/pasudafirisixazu.pdfIn PDF document text
    • http://tuzotumefakorok.scienceontheweb.net/lulikazir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375896/normal_6065eaf6a935e.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/Yifjfhi/good_questions_to_ask_graduate_admissions_officers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_6038549ad1517.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/agricultural_science_textbook_grade_11.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/canon_in_d_violin_solo_sheet_music.pdfIn PDF document text
    • http://pikufufunuti.scienceontheweb.net/6th_grade_math_midterm_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/jge2HSh/kejel.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/Dh1dhif/western_hero_redemption_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_6048d682b03bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_95aee10e97124ab0a4b8d5b60137b08b.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_ce6a8b071f4c44d0b364355553a4799a.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_d6eed9618939461cba262f7b9011d25b.pdf?index=trueIn PDF document text
    • http://vipuzala.myartsonline.com/59833836636.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/english_speaking_learning_books.pdfIn PDF document text
    • https://7ce190f9-fb8d-496c-a51a-ce151dcc024a.filesusr.com/ugd/e72def_a75d03d887cf4677aef2ceb7743aec02.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_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 5540 bytes
SHA-256: 4441e973b5f5e9ac8c2ac399b087f85f06a76472d217a5dbf223de1c6c103cd1
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10908 bytes
SHA-256: 6d862fe84f9abd60a317ebac9bef1b2592a359a02e2131a830c56e5df4004db0