Malicious PDF — malware analysis report

Static analysis result for SHA-256 e390025cf1ebc97b…

MALICIOUS

PDF

116.1 KB Created: 2021-06-10 15:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0996fc33028e254010267cb1135315e4 SHA-1: de234efc9c94fef9c67e0dd0c5afff87d19e7e65 SHA-256: e390025cf1ebc97bc0646b1cbb37c8c8cd90014a75f5020de81876eec16ed48d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a site that appears to be part of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://garglob.ru/pbw?utm_term=rise+of+the+tomb+raider+baba+yaga+walkthrough
    • https://cdn-cms.f-static.net/uploads/4475586/normal_605f65abaffae.pdf
    • https://cdn-cms.f-static.net/uploads/4388835/normal_60544c8ce543d.pdf
    • https://simovisebosa.weebly.com/uploads/1/3/4/6/134649932/bivaraz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e1d50b1c-1d12-45b1-8fb6-c153bd4dc5f5/how_to_open_filter_door_on_miele_washing_machine.pdf
    • http://lomubel.pbworks.com/w/file/fetch/144562593/dnd_5e_sorcerer_warlock_multiclass_guide.pdf
    • https://uploads.strikinglycdn.com/files/5aefee5a-ae45-4c76-83ad-f4e850801560/how_do_you_start_a_dewalt_3000_psi_pressure_washer.pdf
    • https://uploads.strikinglycdn.com/files/be07bd10-ded6-483b-9410-035294af5387/85917193666.pdf
    • https://uploads.strikinglycdn.com/files/daa40c77-e42b-4448-aff9-223336a6fafd/37974807268.pdf
    • https://uploads.strikinglycdn.com/files/c880aa23-bf9f-44b9-b808-214078b103e3/bufobunawuramonuxinexu.pdf
    • http://mabigeroxoso.pbworks.com/f/pumazorijexe.pdf
    • https://uploads.strikinglycdn.com/files/5985b498-d7ec-43bc-a3dc-1f1f9982d4cf/61733910892.pdf
    • https://uploads.strikinglycdn.com/files/df9f87bb-02dc-4bb0-a954-931e7e540f08/33027713894.pdf
    • https://uploads.strikinglycdn.com/files/a3a7e955-8903-4ed2-84b5-253b7b8e2ab1/27927783126.pdf
    • https://uploads.strikinglycdn.com/files/ccfab60b-af6d-4805-a477-1b8d7539e7c1/pamepotezutijopozube.pdf
    • https://uploads.strikinglycdn.com/files/8ee056af-ff66-4b07-bfee-a8d9c664cf41/fonukorejawipeju.pdf
    • https://uploads.strikinglycdn.com/files/8edbd3d9-8592-44b8-a616-c53404f3aa76/69863863761.pdf
    • http://kibarilotog.pbworks.com/f/pokemon_sun_moon_mod_apk_download__50____Low__0.pdf
    • http://xetuduju.pbworks.com/f/29388173218.pdf
    • https://uploads.strikinglycdn.com/files/ac2d9348-04dc-4c92-be8e-f9697cdbc810/irobot_roomba_i3_3550_review.pdf
    • http://rilewikem.pbworks.com/f/nabivik.pdf
    • https://uploads.strikinglycdn.com/files/0772b7e0-3229-4ff8-a7b6-d252183620f1/ma_driver_license_renewal_form.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_off0001866e.bin
d5c080ca17355883a3bd082a9117d7bc2d56600076ab91ad745e002334446b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1866E 5724 bytes
font_01_sfnt_off000199d7.bin
2efb7d97c12333a019bb5b00df069b75e7359408327be0c7c08b035c757e88fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199D7 13496 bytes

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