Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddddb04bdacbbd3…

MALICIOUS

PDF

76.2 KB Created: 2021-05-24 03:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 97e5bd9016eeab992cd05db056fc52f4 SHA-1: 2fb80c8638c0188425b0eff9aaa250f8921c324d SHA-256: 9ddddb04bdacbbd3daf75692a1436bffb0da91bfd9c9f1dd1e5e5e90bf20b0a9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=el+diario+de+greg+2+resumen+libro PDF link annotation
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/2952757.pdfIn PDF document text
    • https://wemodolitafuroj.weebly.com/uploads/1/3/6/0/136055174/1785836.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/mikojafem-togavu-wujekepejifave-bixazufad.pdfIn PDF document text
    • https://gabesusot.weebly.com/uploads/1/3/4/8/134895193/mewesojitoxirosinu.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/gofejoxujozufe_mujaxozunidu_zuvegepamiget_pubuvonavibize.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/3b719768.pdfIn PDF document text
    • https://wetexojozow.weebly.com/uploads/1/3/0/7/130740218/4007969.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/b4cd284f-d110-4fc1-a111-2eb83484a968/39883218227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ddb7b8-a86b-4a0a-bcd5-85aed8cf406f/tefisuzakitixixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ebf039-33d3-4e9b-8ef1-f28ba3f8a249/deep_nutrition_catherine_shanahan.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/craftsman_dyt_4000_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f355a95a-fce0-4d88-9647-11af21b946f4/beste_samsung_telefoons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664b528a-f154-4652-98ab-6cb1ea5ad259/tie_dye_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6f595c-8b15-4747-8143-b66328cc4b10/ipod_nano_2nd_generation_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79068a05-a408-491a-a9aa-5ed4ac6360de/avital_4103_remote_start_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/furovo.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/mumuxulu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/10530303566.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/wow_shaman_guide_healing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de5a5c5-6a0d-4054-b7f5-201384ecc8ac/how_to_do_a_food_safety_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/52130952092.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5372 bytes
SHA-256: f7a0896a174129aca5dedc04a251da35012727d889eaf1ebd76d2a9969e22dee
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 12412 bytes
SHA-256: dddbf61307f235269110e484e9751a954c3c3a29acb4ca7a2dceda880828acb1