Malicious PDF — malware analysis report

Static analysis result for SHA-256 f289153a022e7902…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 14:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cf2d0ee147654db52a6a370f0d2eecfb SHA-1: 7d7a6c114bddf914c0b8fa0a8f42365c93000302 SHA-256: f289153a022e7902ca49ee38dc4e5025471e9263b24761d8876fc21318824c6b
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, but the presence of numerous external URLs indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://baarspo.ru/123?utm_term=omega+nutrition+centre+masticating+juicer+reviews PDF link annotation
    • https://xipakopubax.weebly.com/uploads/1/3/5/9/135966228/gototuloritepo.pdfIn PDF document text
    • https://zijunuriv.weebly.com/uploads/1/3/4/8/134892089/6841fb1.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/fuwonipetupuf.pdfIn PDF document text
    • https://bedusetifimanov.weebly.com/uploads/1/3/4/8/134846759/tarolikuwulemolidug.pdfIn PDF document text
    • https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/sezapegirekala.pdfIn PDF document text
    • http://italystore.pro/more_triangle_proofs_cpctc_worksheet_answers887qk.pdfIn PDF document text
    • http://taher-tcac.com/naxutluoru.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/91673.pdfIn PDF document text
    • https://feleluxotikuko.weebly.com/uploads/1/3/4/3/134338959/7482312.pdfIn PDF document text
    • http://tegor.xyz/wupibutuzezame65xfk.pdfIn PDF document text
    • http://tradebot.space/4673906404leh8h.pdfIn PDF document text
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/fufukebid_majizatamejo.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/c68cac3d.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/simovuvonakov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_bbd04b5d488b405b8a170f566ff3852b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/mac_android_studio_gradle_sync_failed.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_60f6825e298546fab3b2dc6cec168f45.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_5713f066ca0442949859ee6dbd9d75c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/46521131986.pdfIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_999c3156750a4305bcf7884f0071baaa.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_3e840cc863cf42c5a3938826638791c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/android_root_program_free.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_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 5340 bytes
SHA-256: b8269a53c674456ca8bb7ec3f2e853c236432d16c37e2a503043aa6c1099f475
font_01_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 10636 bytes
SHA-256: 86af1540153d7317a7944ec5baa7f48dd82e01e7f93739585161caeeb4533a0c