Malicious PDF — malware analysis report

Static analysis result for SHA-256 113199da8e1b485e…

MALICIOUS

PDF

79.7 KB Created: 2021-06-09 10:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3734594b23fd12cfdc614402323969c8 SHA-1: aef5ef149ca684a80229071502c5ccd1aa4e2c9d SHA-256: 113199da8e1b485ea8046b6fea08ecccb5d5ac3e0edf05c012a57f291b89b4e9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/pbw?utm_term=blank+geico+insurance+card+template
    • https://cdn-cms.f-static.net/uploads/4376101/normal_605f67e8970f7.pdf
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/tapopinuzo_jonafebutejawut_wabadagupivuzo.pdf
    • https://cdn-cms.f-static.net/uploads/4421937/normal_601364ddeefef.pdf
    • https://gimebupezepufo.weebly.com/uploads/1/3/4/5/134507041/mezuw.pdf
    • https://sidagavaru.weebly.com/uploads/1/3/2/8/132814791/dojupulamave.pdf
    • https://static.s123-cdn-static.com/uploads/4383471/normal_5ff3d5db2ca93.pdf
    • https://bodivikofe.weebly.com/uploads/1/3/5/3/135332590/6abe8fb4e.pdf
    • https://novifabapidujup.weebly.com/uploads/1/3/5/9/135975767/lidikarera-nizosa.pdf
    • https://notususapi.weebly.com/uploads/1/3/4/0/134012365/nuwavudibog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a2343b1-8f96-44e6-9da5-978a45f69682/fapewovobuwelidak.pdf
    • https://uploads.strikinglycdn.com/files/ee7da10d-38cc-43b7-a6cf-180060703fe5/super_smash_bros_brawl_rom_download_android.pdf
    • http://veweran.pbworks.com/f/budgeting_loan_form_contact_number.pdf
    • https://uploads.strikinglycdn.com/files/18f9e52a-89e4-4d9d-8ee5-640e464c9ba6/28241898540.pdf
    • http://nefusim.pbworks.com/w/file/fetch/144727842/rdr2_madam_nazar_location_nov_26.pdf
    • https://uploads.strikinglycdn.com/files/d68bb822-4236-425b-bed0-7d9e0b657ea0/41978163714.pdf
    • https://uploads.strikinglycdn.com/files/aa7e1fb8-bc1b-4616-8cc9-b860758a253c/jagubujenuvodosizosugevo.pdf
    • http://vadibun.pbworks.com/f/parts_of_blood_worksheet.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_off0000f98d.bin
0990c0b7b4f559916f293298ced30e0b344abb00ff28abea16d4bde6ad535f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 5508 bytes
font_01_sfnt_off00010c33.bin
6effa5a9d31fa265ca09c6f7b4185e0812dc2cb74e24fac7c819187195274b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 11104 bytes

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