Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c093117bd85e822…

MALICIOUS

PDF

76.0 KB Created: 2021-05-12 12:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8dbc68df402c1d816268ec51915e8f6c SHA-1: 7457263e2eb4be2a520bcabe3cb85de6e86b3aca SHA-256: 5c093117bd85e822a990d5a8911faf0136cb2632172d72b7fda420b85a949514
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with at least one, 'https://zajinet.ru/strik?utm_term=coleman+powermate+pressure+washer+carburetor', appearing to be a redirector to a malicious site. The document body, though heavily obfuscated, suggests a lure related to product searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=coleman+powermate+pressure+washer+carburetor PDF link annotation
    • https://cdn.sqhk.co/jilebodetifa/di32id3/66194986773.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/ggwbheC/helicopter_parents_college_stories.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/hjVgegj/on_my_own_ross_lynch_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/bjcBgnl/6885255480.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/tawexumomukefifeb.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/wegesiravaxasorifilu.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/types_of_shallow_foundation_in_civil_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/d9mw7Yg/carson_wentz_career_stats_college.pdfIn PDF document text
    • https://cdn.sqhk.co/pexejaxer/hgjfngi/age_of_wonders_3_rogue_guide.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/6e8c275f-62c4-410c-ac1f-c56d6875fed3/when_did_kim_il_sung_die.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/how_to_answer_hr_question_why_should_i_hire_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71008549-288b-4d6f-adf7-5182a7afa910/54963737253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567f87b7-b49b-479b-84a5-ed4cffa09e85/how_to_clean_stinger_bug_zapper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b637d0d5-73fd-4d35-8e46-69af68f2192b/39402925556.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/compound_subject_worksheet_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/59768122864.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_1ce6732167e04fabb30e283441ec4348.pdf?index=trueIn PDF document text
    • https://505cb4c7-8bcc-4325-9389-6db9c804ee15.filesusr.com/ugd/b0b521_78bbda8b5e4c4a109b3b0904b9daecef.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_62580486f21d449c8d4a5bf408305cfd.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_33fd077c3f804d9f94891d6471e97978.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d36546-c773-46b2-b4eb-e0d8a7519cbf/is_the_girl_with_the_dragon_tattoo_trilogy_on_netflix.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_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 5308 bytes
SHA-256: d2292d1a749ab09aa19ad58dfc46c16624340914fe1e0dfb1a93d921fbe0ce7d
font_01_sfnt_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 10916 bytes
SHA-256: 15c15c28f5380d0669c97a757feb1e156be875502d8890a9e54405e9225577a9

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