Malicious PDF — malware analysis report

Static analysis result for SHA-256 8581f00552d95a76…

MALICIOUS

PDF

76.4 KB Created: 2021-04-03 03:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 75d6e07a539c473f40c56987996884ec SHA-1: 500193749e20743d788acdf830a223589b65a779 SHA-256: 8581f00552d95a76560b1ab2e10a0923eb489a5359d2cade62ec8bf12d1191d5
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, including one pointing to a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The document body, though heavily obfuscated, appears to be a lure related to appliance manuals.

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://lozipotod.ru/wix?keyword=frigidaire+air+conditioner+heater+window+unit+manual PDF link annotation
    • http://letinebab.mywebcommunity.org/8510766014.pdfIn PDF document text
    • http://vowuzemiru.medianewsonline.com/xefuwaviboxos.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/nelafexujemoli_votasufoneni.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/chinese_radical_dictionary.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/how_do_you_clean_a_broan_range_hood_fan.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/punebagoketonamifimi.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/74025110586.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/32ee34472d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_695d6c77273f4539ab07818d4c6701b3.pdf?index=trueIn PDF document text
    • http://wumugajus.onlinewebshop.net/fefanofaneg.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/a_weekend_with_the_family_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064de6fa-2476-42a6-9b44-040524782255/zuzonenufimov.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_391c08e7b62d4d9dbd67e52b9eded000.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65439ba7-78e7-4f13-b7cb-95c2161fcf1a/48042308803.pdfIn PDF document text
    • http://sizemogigu.myartsonline.com/77633087634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f78b1ba-73f8-409d-97e3-81de59d34147/the_mortal_instruments_series_books.pdfIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_8541554398c147a997d9bb395995b5bd.pdf?index=trueIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_2b1f36a3698d42d380d84c3721c2abfc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/664be034-7b13-44b0-9ea7-5fc57afb87eb/mf_124_baler_knotter_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/slogan_about_the_impact_of_globalization_on_communication_with_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/job_interview_question_whats_your_biggest_weakness.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_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 5220 bytes
SHA-256: 3d9ddd5c41ecab49e54b8c0f1d6a93f54e077e8e4047df8bcaff873b0935275d
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 11036 bytes
SHA-256: 21880e0a25b54541b8b7c192fe66e96e1821d7671e17cc05905aa2a12a37179c

Open this report in the interactive analyzer, or submit your own file for analysis.