Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0fab939df8366c…

MALICIOUS

PDF

100.0 KB Created: 2021-03-15 10:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 428d1787e2e4e10b27f3194a929f42d7 SHA-1: 8ea3be075c8e923c8ab2d662c4ba981137ee59be SHA-256: eb0fab939df8366cfb527c3799342fc8b27d6c80dbf93eb9b480398701461202
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://botokaw.ru/wix?keyword=redbud+trees+photos PDF link annotation
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/ginavunuraw.pdfIn PDF document text
    • https://gadolelexuzited.weebly.com/uploads/1/3/4/4/134486477/wesifem.pdfIn PDF document text
    • http://beststudent.fun/kotalupugipebolalosodagazwn6gb.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/uHhbISp/border_patrol_agent_jobs_near_me.pdfIn PDF document text
    • https://divisekul.weebly.com/uploads/1/3/5/3/135347680/6937336.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/0ab6ccc8.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxiwugo/ajhokje/f1_2021_playstation_4.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/zewarofa.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/36fc19a1dbd3.pdfIn PDF document text
    • http://roflan.site/62841116047s41cz.pdfIn PDF document text
    • http://lolkek.xyz/download_tutorial_blender_bahasa_indonesiahs963.pdfIn PDF document text
    • http://merovew.xyz/klein_organic_chemistry_solutions_manual_3rd_editionuthzj.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/9a3212fa1.pdfIn PDF document text
    • https://cdn.sqhk.co/bivaxijo/c4z18Et/59340308644.pdfIn PDF document text
    • http://ecoservice-vlad.ru/bejeweled_classic_top_scorersnfqys.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/i3jfiaN/godojil.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/baseda.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/68d33ec2-66d2-44c8-8fb8-a808b8cde987/state_and_colour_of_halogens_at_room_temperature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d4f3f7-fe55-46f6-99a5-a91e26986804/chipotle_breakfast_burrito_sauce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e6d114-6933-4435-ba86-845d9214f321/66517126197.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/90577150738.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/hq_trivia_answers_app.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_off00014b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0E 4952 bytes
SHA-256: d1ff91f00c1932aa8998c1f2bb726123ff6c6ced9937eb24052b66b1a9e280d3
font_01_sfnt_off00015bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDB 11456 bytes
SHA-256: d16716aa44633e6c270b4623b67142282b5a5c89e1130a1db4f2f9e0404be328

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