Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a270d01c097f952…

MALICIOUS

PDF

74.9 KB Created: 2021-05-30 16:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fedb0beab640900662e82609257400f6 SHA-1: deb2ae82caa243e7f1034339ed418573e24dde7c SHA-256: 1a270d01c097f9528c9e05ff39738479828cbbaa86a51dc6f9fe89c2489e5554
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure for 'free Minecraft', a common tactic to entice users to click on malicious links.

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://jottigo.ru/strik?utm_term=free+minecraft+no+download+just+play+unblocked PDF link annotation
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/742174a8057ac.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/d075ca4bf05b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_605dc857d65f9.pdfIn PDF document text
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/d4df95687e1c4d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_60411c562c81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_6027cc6c8b2ba.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/jixutanotoxemax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5ffcb6428451a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5ffb7ce73bc8f.pdfIn PDF document text
    • https://vatelepetelijul.weebly.com/uploads/1/3/4/7/134765631/fekobidagorin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_5feaed549a1c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_6015840311bb5.pdfIn PDF document text
    • https://rukewopesix.weebly.com/uploads/1/3/4/2/134266340/3803329.pdfIn PDF document text
    • https://kamupusinupe.weebly.com/uploads/1/3/4/6/134691545/nubulugamogidafakim.pdfIn PDF document text
    • https://getukesi.weebly.com/uploads/1/3/4/7/134735407/c98dac0f.pdfIn PDF document text
    • https://marelepo.weebly.com/uploads/1/3/0/7/130738501/mofij-tozida.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/zawozutonub_jemumumural_fowoxetodakokon.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/0aec8b51-8b0c-4c6f-b371-2f404e718fbd/koduwimejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763d41bc-fb5a-423a-9d1e-1f0890163103/xolovedofadegadalafewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b1a689-b794-402e-a234-056816e7960a/connect_directv_hr54_to_internet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba06653-7616-4385-b946-0620224efd08/are_armitron_watches_expensive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688c2d21-c06b-4796-b132-6e46644e9a82/76527131922.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_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 5732 bytes
SHA-256: 10b989f838e04b0b1ce50bf5b5d6296f0f93dd24ba085cbbe7d6fc739c5f4e5d
font_01_sfnt_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 10120 bytes
SHA-256: 93b4bc5a6d004960e6c3d0de5aad6e47c4b5586cc4f5f732577583a43ab58dc7