Malicious PDF — malware analysis report

Static analysis result for SHA-256 79865dc36891af26…

MALICIOUS

PDF

88.4 KB Created: 2021-01-16 11:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e24998fd8f06c107438122a8f23612c9 SHA-1: c1b24cc8ba6ae8e0e411c456fdb876f25e4075c0 SHA-256: 79865dc36891af260f0c0a65566298b0e00c1a69ab2bd7e5b8ce8e2c4c9ec6b1
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or scamming intent. The presence of numerous links on disposable hosting further supports this, suggesting an attempt to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=student+development+theory+tinto In PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/dasobus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f9df70d99117.pdfIn PDF document text
    • https://site-1172154.mozfiles.com/files/1172154/lovecraft_quest_cthulhu_rising.pdfIn PDF document text
    • https://site-1174730.mozfiles.com/files/1174730/sms_spy_online_free.pdfIn PDF document text
    • https://site-1176985.mozfiles.com/files/1176985/vivah_video_song.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/maradepiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5fcc3a2fd2dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fb37f5228a33.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/boyds_forest_dragon_care_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/jerFhaH/shortcut_key_to_lock_screen_in_windows_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fd2d4ac50e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/pDijiek/scientific_method_maze_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5fdc79f695f67.pdfIn PDF document text
    • https://site-1176633.mozfiles.com/files/1176633/famous_movie_scenes_to_recreate_at_home.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/virgin_atlantic_airways_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/onlyfans_free_website.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/loudoun_county_public_school_calendar_2020-21.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

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_off00012017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12017 5076 bytes
SHA-256: d5a10d6692d9d0bd566e4771cdb7d9fad415c2cf811d7e11f734e7a0399e332f
font_01_sfnt_off00013140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 10172 bytes
SHA-256: b8c69ad5d55a6bad039c72c0e02b431b26ccac89df0d5e8886b3cf074985bc5f

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