Malicious PDF — malware analysis report

Static analysis result for SHA-256 146ac14e4debc1a7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 07:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6a53cfd5b260a42fda6a34d612d01440 SHA-1: b69311e7862c749a1c4b014fb19d4a127388e6f2 SHA-256: 146ac14e4debc1a748dc3df1027d642c073f0b0a10546417638bec28ff613b27
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URL 'https://lozipotod.ru/wix?keyword=drift+hunters+unblocked+weebly' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=drift+hunters+unblocked+weebly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416494/normal_603cb01aeb133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_60203914f3add.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/bomuvixijisetesewe.pdfIn PDF document text
    • https://wutodifutatur.weebly.com/uploads/1/3/2/8/132814097/623aa599b2e.pdfIn PDF document text
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/4801263.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f5509b-9b7e-4ddb-981a-594e7d8958e1/75965584347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ac6e4ee-c52a-4e04-bd56-0bc4269d84f1/schwartz_quantum_field_theory_and_the_standard_model.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/nfl_week_6_printable_pick_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a128278-d695-47fc-8d7d-911056fa1467/27052911137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022f2716-020e-4336-8f98-5ba5e705eb35/how_do_i_order_a_new_child_support_card_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/the_chemistry_brand_hand_cream.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/40467592297.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/senapikilodaximu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5000193-e277-497e-877d-24696496abdd/how_to_stop_car_alarm_hyundai_elantra.pdfIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_713ae283aee24c3fb23ec32bfe8b1df9.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_aba6e3b94c83422983499dc24e650ce6.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_bc16caa323e643b3ad76887b61b8e1a4.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_ed538782fa86403abaa29a9d38eb2c14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/731726a5-2e0e-462e-96f2-c144a904b3bc/bandura_a._1971._social_learning_theory._morristown.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/35059976904.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_c3157c87c5594ba3bb5fb9d4d51dc360.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af00c322-bae8-4740-bcca-88a491adcc79/23491655093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779d3664-7cb3-4151-9091-2e48d652ddee/rumajutiwa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 5296 bytes
SHA-256: 289253939975b6939e13e24d643920ac4b8234e843b3d806ed947612293a2235
font_01_sfnt_off0000fdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF6 10788 bytes
SHA-256: f9c0226e96ec1b8d77d39a5e78616fd8d094bab00cd79e9ecaf510af101359dd
font_02_sfnt_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2