Malicious PDF — malware analysis report

Static analysis result for SHA-256 226645445ba687d0…

MALICIOUS

PDF

112.0 KB Created: 2021-05-22 00:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27bcdfde155bf4c55e4073415753b9fd SHA-1: 77195af3f5e294983d844e9306c44ed683cdb5fc SHA-256: 226645445ba687d090f4f3a0ae216daf60fc1703d8f04df2171d76f3fab45e05
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to a '7 day meal planner pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=7+day+meal+planner+pdf
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60636f79f2a58.pdf
    • https://cdn-cms.f-static.net/uploads/4458388/normal_60129a13c7c38.pdf
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fe22749d3678.pdf
    • https://cdn-cms.f-static.net/uploads/4408463/normal_60125b61433b6.pdf
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5ffb6d1da1187.pdf
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fe14fb0b35e6.pdf
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fcf17866bacd.pdf
    • https://cdn-cms.f-static.net/uploads/4374371/normal_6064d06bd46c0.pdf
    • https://static.s123-cdn-static.com/uploads/4443617/normal_6008b28c95086.pdf
    • https://cdn-cms.f-static.net/uploads/4445334/normal_60405df2001aa.pdf
    • https://static.s123-cdn-static.com/uploads/4383800/normal_5fc6803861631.pdf
    • https://static.s123-cdn-static.com/uploads/4370547/normal_5fddf522df192.pdf
    • https://cdn-cms.f-static.net/uploads/4421342/normal_600adedd1785e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8d766ef-85ba-4aa2-9429-b9ce70e5dcb7/44275244597.pdf
    • https://s3.amazonaws.com/kufazete/how_to_read_deadpool_comics_in_order.pdf
    • https://s3.amazonaws.com/juvetaso/adobe_premiere_pro_cc_free_softonic.pdf
    • https://uploads.strikinglycdn.com/files/b9233e33-ec94-48e1-991d-e53ba38f9000/kenneth_cole_watch.pdf
    • https://uploads.strikinglycdn.com/files/87b35ab1-f1db-4b0d-b44d-d42f0ecb4f1f/java_jdk_8_download_mac_os_x.pdf
    • https://s3.amazonaws.com/lixuduwonifa/24195938802.pdf
    • https://s3.amazonaws.com/fekife/70431492686.pdf
    • https://s3.amazonaws.com/tomaxade/bifold_brochure_mockup_free.pdf
    • https://uploads.strikinglycdn.com/files/cfbfb218-889c-4241-bf13-334e3b4dec9c/bukalat.pdf
    • https://uploads.strikinglycdn.com/files/62e0cfc0-b725-4a32-b33b-08c0ef4a73ea/71209461263.pdf
    • https://s3.amazonaws.com/bededuxotulapil/81774430772.pdf
    • https://s3.amazonaws.com/gajabedafot/bizogegojegojijagitanaw.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016659.bin
39a10a1bb8538f0f8f60add8af70469c51c6611040ad884b32791a0877134e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16659 5096 bytes
font_01_sfnt_off000177a7.bin
ec29657443ca3b04dc946322d47c20dbf219a3fa77c289e6c87ebc6a135d4e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177A7 10756 bytes
font_02_sfnt_off00019c98.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C98 16060 bytes

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