Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdaf717ed265875…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 09:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a26dd236cf837496d1f905a294ffefef SHA-1: 853810df4053813ca6a99a0e904721a485fdfedf SHA-256: 7fdaf717ed265875b5c6df81783a109ce5fb42f35eba1173ed02496a30b033c3
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/award?keyword=irregular+verbs+present+simple+exercises+pdf PDF link annotation
    • http://pixelbarista.com/538299506074inti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_6018e16989545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505125/normal_600646b902c63.pdfIn PDF document text
    • http://hellesypakk.online/gipagiv9924.pdfIn PDF document text
    • http://hs-life.ru/6265644229355r3q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_6027c684339d8.pdfIn PDF document text
    • http://espacecmb.xyz/736523408668flst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_5fe887107a384.pdfIn PDF document text
    • http://russianpatentexpert.com/norcold_model_n611rt_recallgogjy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5fcc454e9d70f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/29024862859.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/27576619899.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_219e443650ba4f7a874bb5c20917443b.pdf?index=trueIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_d1b4ab6c1c7644fba9f2c0c407002c53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/cookbooks_for_dad.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_66f1b99f1b884fa2952c98096398c3fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujirageg/89829106435.pdfIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_e16de37165ef4367ad644b1ed0787d70.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_973da476cd3d4dca8b7e8879f0986563.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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5680 bytes
SHA-256: 1648e44ab3bd77368d82f342af0f2bb7b0e20519311dbee723ad4448385c9579
font_01_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 10228 bytes
SHA-256: 24d34718fd37df37648d39b2176848d70a2e756fec40a20438dd8aa08ad3263f

Open this report in the interactive analyzer, or submit your own file for analysis.