Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3cea4bcc90c9f8…

MALICIOUS

PDF

96.7 KB Created: 2021-03-31 07:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8d757bc5d431de9b2222534d0fb6ee1 SHA-1: c8e8cdd29a25164923fbf3773e74a9408eef913a SHA-256: 0f3cea4bcc90c9f897d6963b7291ef555526526408c567a81b277b7ec674e044
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, https://lozipotod.ru/123, is likely used to distribute further payloads or redirect to phishing sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', reinforcing its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=information+theory+equation
    • http://vsedlyatebya.xyz/bhanwar_khatana_ke_rasiya_2019lfwam.pdf
    • http://myluckywin.site/gazabapomarutbu44e.pdf
    • https://tigepofawi.weebly.com/uploads/1/3/1/0/131071288/fifabameganevo.pdf
    • https://xusemiwo.weebly.com/uploads/1/3/4/8/134899199/wopekiranolofi.pdf
    • https://lumejukotexute.weebly.com/uploads/1/3/1/1/131163930/2441192.pdf
    • http://storeyou.store/fdic_money_smart_modules_answers47tuv.pdf
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/zaruwuzomofawile.pdf
    • http://alternativeinfluencenetwork.net/bolens_140cc_lawn_mower_wont_startg7mvn.pdf
    • http://snapchat-alert.com/83163339327xvmef.pdf
    • http://natnat.fun/gekewufcsxtx.pdf
    • http://belldiscount.ru/chemistry_modern_periodic_tablebi9jx.pdf
    • http://ipatovaalena.ru/gafawofkmi8r.pdf
    • http://winoorama.fun/af_1288_instructionsoufzf.pdf
    • http://reassurez-moi-fr.info/shark_euro_pro_sewing_machine_how_to_threadm258v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/877c7b47-1ced-46e3-b560-1c829cfe0dd6/junior_software_developer_jobs_melbourne.pdf
    • https://uploads.strikinglycdn.com/files/e72a99c2-2c87-43a8-bea2-c6010f065c41/how_to_set_up_a_pole_to_catch_catfish.pdf
    • https://uploads.strikinglycdn.com/files/d6f81822-3f84-4bf0-8c99-d2dbe983fc1f/tiwebilusafunivokinomub.pdf
    • https://uploads.strikinglycdn.com/files/bb97b2f7-ae1e-47bd-8ffe-ea0e0deb8224/71832121048.pdf
    • https://uploads.strikinglycdn.com/files/20b81183-15e6-4d72-a92b-d4f551a84d0d/the_collector_3_2019.pdf
    • https://uploads.strikinglycdn.com/files/36b30c44-319a-42ba-bd5c-8a4a23f81fa3/peak_by_anders_ericsson_and_robert_pool.pdf
    • https://uploads.strikinglycdn.com/files/dcc2ad78-5d82-40a9-933c-40a081dc7172/68075178339.pdf
    • https://uploads.strikinglycdn.com/files/69880c55-6058-4e5a-bb99-ba1a594bdfd6/janitetunurunowifabixowu.pdf
    • https://uploads.strikinglycdn.com/files/66b97f07-2f99-441d-a98d-b55bde53867d/salary_for_cloud_security_architect.pdf
    • https://uploads.strikinglycdn.com/files/f2485824-9192-4ea9-a41e-6ef73ff43f58/zixexuvadimilofiku.pdf
    • https://uploads.strikinglycdn.com/files/96a9011e-3543-4349-af25-558c0954a928/how_does_negative_ion_air_purifier_work.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_off00013cf0.bin
7840bb9046631cc192942d5b184a6da4d07431cd4760e91aec79edddc61226d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF0 4960 bytes
font_01_sfnt_off00014db0.bin
36ff9e2665d1281193a3746d31dcc3004049acbd06d5244cf9ae3020c65e0978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB0 11332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.