Malicious PDF — malware analysis report

Static analysis result for SHA-256 9289727ff09f615f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-12 19:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd43d8299213e1c8423b7a81e39192d9 SHA-1: 1bfd0b822e0a2ce18d29caf27c81175818584237 SHA-256: 9289727ff09f615f6779c3cf7e8b7cf0f2719f3f580b830db515c6878e09cebc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the PDF is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=national+antibiotic+guideline+2020+pdf
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fe273a07c6b3.pdf
    • http://zawugudumi.getenjoyment.net/rupirufofilegemijuw.pdf
    • https://wevenakexeg.weebly.com/uploads/1/3/1/4/131438808/fedunepekuvap-nanefusefejov.pdf
    • http://tiwimifozukimu.medianewsonline.com/what_to_say_when_making_amends_aa.pdf
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/3388a9.pdf
    • https://xokekomoto.weebly.com/uploads/1/3/4/5/134598663/f0ff85.pdf
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/f58a172623a.pdf
    • http://sopidemeleket.mygamesonline.org/wizard_spells_5e.pdf
    • https://cdn-cms.f-static.net/uploads/4489716/normal_600aacedbd03a.pdf
    • https://bovuxubirike.weebly.com/uploads/1/3/0/7/130738735/41014b.pdf
    • https://cdn-cms.f-static.net/uploads/4369318/normal_603ad10e9e24c.pdf
    • https://static.s123-cdn-static.com/uploads/4403560/normal_5ffdeee12fb2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c2057bb2-0d29-44bc-bb54-609c41444e8a/how_to_sync_petsafe_collar.pdf
    • https://uploads.strikinglycdn.com/files/2a0fad79-e54b-4192-9679-9765bc22e4b1/pawaroxixifaderap.pdf
    • https://uploads.strikinglycdn.com/files/33052b95-2a01-4ce4-8b8f-f8d8ed8880bd/how_to_buy_home_insurance_canada.pdf
    • http://boxijekew.atwebpages.com/how_often_do_you_get_paid_at_dollar_tree.pdf
    • https://uploads.strikinglycdn.com/files/c5733aa7-23dc-4d91-aaf7-558e00b22882/how_to_edit_passport_photo_using_photoshop.pdf
    • https://uploads.strikinglycdn.com/files/285d2094-7c46-4d23-a617-d957d71254d5/thermo_king_reefer_parts_near_me.pdf
    • https://uploads.strikinglycdn.com/files/4fab9c06-8d0a-4fe9-9dde-9576090bf3f6/c_graphics_tutorial_free_download.pdf
    • https://uploads.strikinglycdn.com/files/b5e27f6b-8c0e-4bb4-821d-43fa68f0d5aa/mefewodudiluluzadi.pdf
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_e4100d13207744cdaa674ea8c5a65fd2.pdf?index=true
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_a6980dae864f4fbaaca81106b2e43835.pdf?index=true
    • https://uploads.strikinglycdn.com/files/629bcafb-b17a-4281-a0af-8119603aee1c/what_are_all_the_negative_emotions.pdf
    • https://uploads.strikinglycdn.com/files/c3d8c195-e134-4fe9-a232-a3c0e6643444/34555178286.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04b.bin
97583eb4091ff3f1807c22dd19990753e13e2228032af79ab674267333262639		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 5432 bytes
font_01_sfnt_off000102df.bin
71fe54d0e0ab266626530399706477f99658bd28b97de9f61b6567a9f39e32af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DF 10588 bytes

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