Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1e506eec34efef…

MALICIOUS

PDF

119.2 KB Created: 2020-11-12 22:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2110216ceb0c15eab4841256130bc9a1 SHA-1: 190ae872731830bff59fc1b9541c5dbd3a183e97 SHA-256: 7b1e506eec34efef1e83cdd1b8fb4e1df33ab2d05cc62ffc3bdab78b8ab45751
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/strik?utm_term=%25D9%2583%25D9%258A%25D9%2581+%25D9%2583%25D8%25A7%25D9%2586+%25D8%25B4%25D9%2583%25D9%2584+%25D8%25A7%25D9%2584%25D9%2585%25D8%25B7%25D8%25A7%25D8%25A8%25D8%25AE+%25D9%2581%25D9%258A+%25D8%25B9%25D8%25A7%25D9%2585+1900'. This URL is flagged as malicious and is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL within the PDF structure is sufficient to classify it as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=%25D9%2583%25D9%258A%25D9%2581+%25D9%2583%25D8%25A7%25D9%2586+%25D8%25B4%25D9%2583%25D9%2584+%25D8%25A7%25D9%2584%25D9%2585%25D8%25B7%25D8%25A7%25D8%25A8%25D8%25AE+%25D9%2581%25D9%258A+%25D8%25B9%25D8%25A7%25D9%2585+1900
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f8c1c7855220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gonima/the_hangover_movie_in_tamil_dubbed.pdf
    • https://uploads.strikinglycdn.com/files/f2d6cb0e-1ed0-4af4-ac8a-f86926222cbb/74440319407.pdf
    • https://uploads.strikinglycdn.com/files/623db4e3-e38a-4031-bd36-a6244f5ab357/download_nba_2k17_for_free_ios.pdf
    • https://uploads.strikinglycdn.com/files/32b499c6-f139-4f91-96ca-3e44d30190d6/gogibamutegetuzagid.pdf
    • https://uploads.strikinglycdn.com/files/3084ba6a-8307-49db-9bee-aa2fb836011a/69279620464.pdf
    • https://uploads.strikinglycdn.com/files/497b8a8e-d1a7-4392-9eac-492dc2ec5829/winadeweteme.pdf
    • https://uploads.strikinglycdn.com/files/fc62f58d-f39e-441d-a74d-3c5ca222277b/volusewiwaladakej.pdf
    • https://uploads.strikinglycdn.com/files/1eaefd97-e1f8-49d7-abf5-6cce83d9ae30/37844008580.pdf
    • https://uploads.strikinglycdn.com/files/7d97c055-9e4b-4f91-af3e-39265559a796/timipagozajotibixigasizop.pdf
    • https://uploads.strikinglycdn.com/files/49bb586e-8da0-4e27-a8f1-0b88d3a28d11/52562147725.pdf
    • https://s3.amazonaws.com/dowesitobuga/66868212770.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00019403.bin
fe0edebb27fa5a83c9071b8f9f45d45d977899f07dc4e31801781607a14a1926		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19403 32676 bytes
font_00_sfnt_off00014aa6.bin
ecd9110d7eb8c8654a9c56325ef901be0210a37b4a45844445bedd9acde76cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA6 4420 bytes
font_01_sfnt_off000159cb.bin
df3bde8a42ce3746f48d25f5952d4907edaf35922821fb4da435869b81c94424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159CB 8428 bytes
font_02_sfnt_off000176de.bin
8ff64751d476651614d81adf6052f526cfcb11d01c3e10ccbd56ee478d21df87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176DE 18384 bytes

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