Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa2bceccc9bf68…

MALICIOUS

PDF

80.6 KB Created: 2021-03-13 19:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a7fa5dec48f70fc6438695193cf4dc00 SHA-1: bc73e09d1197b41d3ea4557abbf4f5c49412b656 SHA-256: adaa2bceccc9bf68446e8fe301395e7dc51d7e8332020c143ac3d88a6b698387
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and contains a large number of embedded links. Many of these links point to redirectors or disposable hosting, indicating a potential link farm or phishing campaign designed to lead users to malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to lure users to external malicious sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=goneril+regan+and+edmund In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5fe21572126af.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/gg0CjdI/safe_zone_significado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_60032324aafee.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/IicQijq/fantasy_tower_defence_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/gofuzurafano/hXidico/happier_music_video_marshmello.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_5fc8c0a15662e.pdfIn PDF document text
    • https://cdn.sqhk.co/vavegewumur/ghaziaZ/need_for_speed_rivals_cars_download.pdfIn PDF document text
    • https://bilojajix.weebly.com/uploads/1/3/4/6/134626800/kuzimogipemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_603387bf4da21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_6033f3af0ec2c.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/brjiySI/warcraft_card_game_hearthstone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fe20981b3131.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/roridaxo.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/gipugob-zuvudokorigogaf-noxizaxozilobuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5ffbddfbb2ccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_6038f68a68b95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_a2d57627830e46509f3cf2bf4474c57e.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_ce39fcec8f13407a90a3075c472b4bca.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_f3ac1a08759d4332a5df928c829d2d5b.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_7815b5babe9144d882b8392204a5174c.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_5463b08c54d04a0696d900043fb06116.pdf?index=trueIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_184b6b22203e4d3787833c1b5ab27aa7.pdf?index=trueIn PDF document text
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_ee12cd0a292440a89c77aa08955ed4fc.pdf?index=trueIn 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_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 5000 bytes
SHA-256: 872909fe557ec79af4243a2fe9eb50a9a3cfea85c68adf016394fc76bddd168f
font_01_sfnt_off00010f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F99 11292 bytes
SHA-256: e9f5f637890766b9900a746cd42e69b4060c772d51242d18e345f055ee0ab69b

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