Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a57af516fa8beb…

MALICIOUS

PDF

100.6 KB Created: 2021-03-31 16:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dea2e02b60830009fdd277c808e914e9 SHA-1: 76fddf3d6794868d890a03e6cd1e71f265c43695 SHA-256: a9a57af516fa8bebba9358de9cd8901e26fc6cfecd5d48e386515bc1be1bc5b9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The primary malicious URL, 'https://lozipotod.ru/award?keyword=body+checking+questionnaire+pdf', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external links and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/award?keyword=body+checking+questionnaire+pdf
    • https://static.s123-cdn-static.com/uploads/4459780/normal_6005af18d54b1.pdf
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5ff39c12bc87b.pdf
    • https://cdn-cms.f-static.net/uploads/4446264/normal_6030e72363fca.pdf
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5ffc237d2c16c.pdf
    • http://gloslides.com/kulefojefokofakim6tt8s.pdf
    • http://fresh-ita.fun/alain_de_botton_course_of_love_reviewarevk.pdf
    • http://6gusevshop.space/owwa_scholarship_sy_2020ty4ta.pdf
    • https://cdn-cms.f-static.net/uploads/4487186/normal_5fd7badf4f67b.pdf
    • http://matteset-spon.space/identifying_proportional_relationships_worksheetqbtdz.pdf
    • http://cosmicgig.com/logic_pro_x_2020_review7nqrw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/83f7621f-be69-4217-8fa2-efe0bc5f0a48/sony_dcr-trv280_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/4d7ee818-6ec8-4d94-b7cc-2ae6d0d96f8d/62753645211.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_59f65ca6814d4e05b96481796c2e79bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/628d33da-e9a9-4060-ad66-7c1df36ff2ae/saranuregeroriziw.pdf
    • https://uploads.strikinglycdn.com/files/2bf9d342-a515-4eeb-93f5-8b95046f223f/64135070987.pdf
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_e5c4c15aa3654c078b527fd27b6d3fbe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3acc244d-2ecc-4923-b742-933f47fb0bf5/sojadosafogava.pdf
    • https://s3.amazonaws.com/xajowu/caltrans_highway_design_manual.pdf
    • https://s3.amazonaws.com/lorifumofelu/mijagiso.pdf
    • https://uploads.strikinglycdn.com/files/7f4e67c5-3e75-4446-9aa7-176532d26918/34850947147.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011301.bin
0e931f0d5dfe2e3683d477d1f18ced819fb2f8f9d6024cce3dbc4b063ca776b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 9456 bytes
font_01_sfnt_off000131f8.bin
172136dfd23d35f3bd8ca550ad81e3eb008e1ceb5832ae9ee6298f4bdc6eb519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131F8 5728 bytes
font_02_sfnt_off0001457e.bin
53de6a3ac9dae6079dbb4f0107e73c7a98a0167dc2ba1f3b979696128a3d1be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1457E 12480 bytes
font_03_sfnt_off00016e6e.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6E 16060 bytes

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