Malicious PDF — malware analysis report

Static analysis result for SHA-256 9678eaebb7e950b3…

MALICIOUS

PDF

66.5 KB Created: 2020-12-23 22:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47987da460f83132b6908d01c68aef2 SHA-1: 6120e5a9a2c3c5084106826dac4f97051290a1dc SHA-256: 9678eaebb7e950b3df10a790bd36e72568c6220400937efd521259379e88b030
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URLs, 'https://traffnew.ru/strik?utm_term=dsi+21.+bolge+mudurlugu+ayd%253F+n+kahvalt%253F', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious document intended to be delivered via email.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://traffnew.ru/strik?utm_term=dsi+21.+bolge+mudurlugu+ayd%253F+n+kahvalt%253F
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5fceb65b754c1.pdf
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/ririxuxikasod.pdf
    • https://cdn.sqhk.co/duxajoje/hcMicfe/islands_in_the_stream_lyrics_dolly_parton.pdf
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/2296839.pdf
    • https://cdn.sqhk.co/jevipugirofi/ifTnjgI/lixifoxulipitexu.pdf
    • https://cdn.sqhk.co/jamolipa/gjhjkic/jodab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7a8aaae8-9edd-43fd-8322-9bd9ad799269/kologagavonugigejixusumi.pdf
    • https://uploads.strikinglycdn.com/files/104a314c-eddb-454e-b677-8ffd52306238/effects_of_poaching_tigers.pdf
    • https://uploads.strikinglycdn.com/files/079592eb-4ca5-4d3e-af46-3b8cfa80458c/32628579437.pdf
    • https://uploads.strikinglycdn.com/files/62a927ac-eac4-4afb-ad9d-9c769d964a66/screen_time_passcode_not_changing.pdf
    • https://uploads.strikinglycdn.com/files/91ab0ab1-be00-4bcc-9e34-f06949c7cac3/11433378093.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aea9.bin
fe4709e7f04fd9fc66053ff21494e5520fce2e4b26d4839314dbeb6f7bcedf45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA9 5844 bytes
font_01_sfnt_off0000c265.bin
6bd0b590634f25a192e6c4dbc5fe8dd02b7f641fa66972b62e7a17577d7117c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 1796 bytes
font_02_sfnt_off0000cb38.bin
ebbc35d1752dc76ca31747ebe033c4e88ee84b311be1e27f4c3b30555511eb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 10328 bytes
font_03_sfnt_off0000ec96.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 4324 bytes

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