Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd9424a948cd24b…

MALICIOUS

PDF

110.8 KB Created: 2021-04-02 01:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ee8b0cbe95b5ac48df7cfa5d39e51e9 SHA-1: bc711af1f9f29a679424ebbae4382ded2cf91119 SHA-256: 1fd9424a948cd24bf8c994fb0c6976aea2807c73ee6be9e8620cac0435164daa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites, possibly as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://zajinet.ru/award?keyword=technical+leadership+and+the+balance+with+agility+pdf
    • https://gunajotigur.weebly.com/uploads/1/3/4/7/134738866/wikexatixirobisix.pdf
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/vokafofed.pdf
    • http://zafijetak.22web.org/maldi_biotyper_bruker.pdf
    • http://save50it.info/which_rock_is_only_formed_by_regional_metamorphisma314q.pdf
    • https://xezajorawelo.weebly.com/uploads/1/3/1/4/131408008/a0d17c195ec865b.pdf
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/0ea172d022c8.pdf
    • http://fastdonwload.space/3062787368xcosg.pdf
    • http://foyou.store/milenyi4mt.pdf
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/bebugunekifemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9f26611-62be-42dd-9b62-7f2d058ca450/integration_of_cosecx_cotx.pdf
    • http://vuvuparitika.rf.gd/diet_for_o_positive_blood_type.pdf
    • https://uploads.strikinglycdn.com/files/65b5403a-f36d-4477-aaf5-a3403f04a237/conair_deluxe_compact_fabric_steamer_instructions.pdf
    • https://uploads.strikinglycdn.com/files/4c5f04c1-308b-4f15-b8a0-6d7d160276fc/australian_business_law_book.pdf
    • https://uploads.strikinglycdn.com/files/a0ff881e-8089-4e68-9998-389dafa35af0/panasonic_kx-tge263s_manual.pdf
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_1f4632f97e4b41eeb3d24081c8fb6666.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cc4f0760-23a8-4c92-ae23-bc6474ebf0df/ruger_lcp_pocket_holster_wallet.pdf
    • http://rapuxatidugek.epizy.com/30285603065.pdf
    • http://fodakobenolam.rf.gd/nosadavatotemawawaka.pdf
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_456a00d6b9ad44bea1f282bc78b93ff7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/492bf258-e09e-42c0-af9d-ba03f4c70f80/zuderilulatixisoxapar.pdf
    • https://uploads.strikinglycdn.com/files/d114784e-70cc-4577-ba9e-cbac8c52a72f/96892692221.pdf
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_25f1f208574743ff940ad75fa421b65e.pdf?index=true
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_4e7be448098648489904e2fd5952e82a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/34d5df47-387a-4340-ad98-66c8eb23a076/which_metro_game_comes_first.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015516.bin
d02892f851a2bfb1d5a8bd71d37a9d5d53643e3ffd539557b253e7a39d8bf136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15516 5700 bytes
font_01_sfnt_off00016889.bin
784762d0c7e6dc65f8736bd0090e973968fec6d636e7761a25cbeeb7bad06a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16889 14388 bytes
font_02_sfnt_off0001977b.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1977B 16204 bytes

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