Malicious PDF — malware analysis report

Static analysis result for SHA-256 f194457d58b327e9…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 11:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30fc0c6f85360fa0e65eb3b476b1d25c SHA-1: bd03fe4f3ecf47794a03543bf4a34d2bdbf8cefa SHA-256: f194457d58b327e99d6cc14d9b67e2fa287c9ee41996253382464aa5e11e3819
176 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document's content, though heavily obfuscated, suggests a lure related to consignment notes, directing users to malicious URLs. The presence of embedded JavaScript further supports the malicious intent, likely for downloading additional payloads or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jumiwimov.ru/123?utm_term=poslaju+consignment+note+template
    • https://rabiwibunefa.weebly.com/uploads/1/3/4/7/134747284/4363829.pdf
    • https://cdn.sqhk.co/merivexasug/b3qrzjd/commander_cody_costume_replica.pdf
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/5467ac8e9.pdf
    • https://cdn.sqhk.co/wazewiput/iaUAhfn/72281158145.pdf
    • https://cdn.sqhk.co/dexizajifu/9iimgeQ/85507844918.pdf
    • https://cdn.sqhk.co/miviterul/cH3hdgf/xepavedek.pdf
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/gunibosesoguvifi.pdf
    • https://wikiredapitij.weebly.com/uploads/1/3/2/7/132712416/4f1f24257b63.pdf
    • https://gagufivelorifig.weebly.com/uploads/1/3/4/5/134596616/5158942.pdf
    • https://watagejikifawup.weebly.com/uploads/1/3/4/5/134589749/ade202eb42734e.pdf
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/vogijakev.pdf
    • https://cdn.sqhk.co/barosevarega/fbheaij/foster_guide_dogs_brisbane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_3a74776a86ac4f848429b8e8920226ff.pdf?index=true
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_2eb8fd608cb74ab7a3d49b692534bfe6.pdf?index=true
    • https://s3.amazonaws.com/gofiguj/84770957103.pdf
    • https://uploads.strikinglycdn.com/files/c5faba2d-6526-418d-8252-39d25e7e0890/surojajef.pdf
    • https://uploads.strikinglycdn.com/files/003b6d4e-e584-4901-95bf-3e5c5aa16a81/ap_stylebook_oxford_comma.pdf
    • https://uploads.strikinglycdn.com/files/795e24ed-c4f0-4d4b-95e8-61419567b35f/6872765390.pdf
    • https://s3.amazonaws.com/legenapi/28354216342.pdf
    • https://s3.amazonaws.com/purawuma/19760758082.pdf
    • https://s3.amazonaws.com/wofaxil/equitable_stroke_control_guidelines.pdf
    • https://s3.amazonaws.com/minabiwa/39976004220.pdf
    • https://uploads.strikinglycdn.com/files/c1ad1a70-7fa4-47e8-a75a-5ef59ab9785a/dilejigikuberubumu.pdf
    • https://uploads.strikinglycdn.com/files/ab087f23-d9a0-4dd6-848f-095f493e5954/tecumseh_carburetor_float_adjustment_snowblower.pdf
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_7fd18c4a37b045f88bc9d64d22e7632e.pdf?index=true
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_2aa6868ac63b466f9156b7c682e793ee.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e574.bin
cf208b22d61ee1c7aef9bc09a48d4660a45688be78b6e1b612686eacf2315bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5236 bytes
font_01_sfnt_off0000f73f.bin
fafa876472b8d3bcac9248751596d1990df763eb59688335f472d424e4aad155		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73F 11628 bytes

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