Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc34d2db4b0822ce…

MALICIOUS

PDF

80.8 KB Created: 2021-04-27 05:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77198c6a6cde6b521f07da8abf7c0939 SHA-1: ea48d7c48c7ab4c5aed6bdfdefff61ae36c89523 SHA-256: bc34d2db4b0822ceaf54da5747396db7d4301931b9ecca838f6379fca10bab85
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, suggesting it is part of a larger SEO manipulation scheme. It also includes an external URI pointing to a URL that appears to be a phishing lure related to financial education. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly indicate malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=how+to+sign+up+for+financial+peace+university
    • https://vezaruve.weebly.com/uploads/1/3/1/3/131378950/pukegorezakubofine.pdf
    • https://tukajolikapuz.weebly.com/uploads/1/3/5/3/135346043/zelisexisa_ledukekuju_nokuragafevofu_dekuzom.pdf
    • https://xororawezajeber.weebly.com/uploads/1/3/5/3/135338150/1660b.pdf
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/d8660593904f70.pdf
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/2346842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/defipedibe/citizen_navihawk_at_mens_eco_drive_watch_jy8030-83e.pdf
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_a19eba606a1047568a8613227aef4642.pdf?index=true
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_6fe71311a05840628ff873e7da68f4c6.pdf?index=true
    • https://s3.amazonaws.com/bidurudilidujug/dragon_ball_z_fighterz_android_21.pdf
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_3e02137951db4ef28d6938c8c46f5858.pdf?index=true
    • https://s3.amazonaws.com/gupojakami/android_chrome_always_use_desktop_site.pdf
    • https://s3.amazonaws.com/kikunojulejuj/tezifatizaraketujozamelud.pdf
    • https://uploads.strikinglycdn.com/files/dfe9bc13-ca4b-41aa-97c9-dca08572cceb/why_is_my_mobile_hotspot_not_working_samsung_a20.pdf
    • https://uploads.strikinglycdn.com/files/372ad965-c159-471b-8b11-1322c1dca7f5/how_much_do_california_foster_parents_make.pdf
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_1cb060de5a5f4b4baf4f65509f18750c.pdf?index=true
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_d81b2619301241068473688242a253d3.pdf?index=true
    • https://s3.amazonaws.com/wamatasamegu/68764462611.pdf
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_13ba77f0af084075a9aaecc05997f42d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7620847-20ec-4aa7-894c-e97a6dafa685/2013_dodge_charger_low_beam_bulb.pdf
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_723e5f51bcde4434a2fd4b0b682cd43c.pdf?index=true
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_e39ede6e80284c0fb777dac14a3f920c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c839d8cf-9c3e-44c6-ad93-63f0e24c8a45/asia_neco_navy.pdf
    • https://uploads.strikinglycdn.com/files/eb7c7bfb-57fd-412b-809e-3810687d5901/how_to_use_bissell_proheat_2x_hose.pdf
    • https://4ebe1e6a-8a13-4145-b3c2-d2faed65f423.filesusr.com/ugd/a67e73_c09d4340ee034228820bd8dd92daac42.pdf?index=true
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_4520f2d935354031aef22359ad7be5cb.pdf?index=true
    • 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_off0000fab1.bin
14bf5da738aebf15d6db4050eb55730525697d8a14cb777c42fae570624ec808		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 5396 bytes
font_01_sfnt_off00010d3f.bin
9572a44d50b3a7ad51550a31bbb65f8299de5791d3e81166028936d8c66daaa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3F 11948 bytes

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