Malicious PDF — malware analysis report

Static analysis result for SHA-256 270fb7d44d4bfff6…

MALICIOUS

PDF

88.5 KB Created: 2021-04-10 07:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3283791cea05b4a3d737ad5f2851b206 SHA-1: 796bb24aab1fcd1202fe4020ff4ca7d1c417e221 SHA-256: 270fb7d44d4bfff6c9dbbf01a64bc988bebd8d38d78f31347f0bee5903f3b3a1
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to 'zajinet.ru' which is likely part of the lure. The presence of a 'download button' heuristic further supports the phishing attempt. No scripts were extracted, but the overall structure and heuristics indicate a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=autocad+civil+3d+viewport
    • http://sibuvre.com/52243480546l6fi8.pdf
    • http://solent.bar/zofosizosebavulodugenivkoiw8.pdf
    • http://kersita.space/bissell_proheat_2x_revolution_assembly_instructionsmiuaa.pdf
    • http://copyright-rules-help.com/62142182940g4g6r.pdf
    • http://helpcontactform.com/rci_2950_dx_for_salee2e80.pdf
    • http://streichpack.online/sazegerakuwudategapixa6hc01.pdf
    • http://vitrinachel.ru/what_is_the_difference_between_bacteria_virus_and_fungi_write_their_advantages_and_disadvantages7gkaj.pdf
    • http://kprovk.xyz/time_spent_on_social_mediaa8v4i.pdf
    • http://saudiautoinsurance.com/sefefuzibovedesofumuxh2fra.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f6e0c6f9-8868-40d6-b932-1803660fcc13/77399527136.pdf
    • http://walizuwimubipof.rf.gd/96903772379.pdf
    • https://uploads.strikinglycdn.com/files/72c0ed34-3255-41e3-8412-47bf778bf54c/97532260647.pdf
    • https://uploads.strikinglycdn.com/files/0c511592-6775-4934-9cbd-d52b5cb7a363/wegozoworegosedileter.pdf
    • http://zarusorujot.epizy.com/81288255747.pdf
    • https://uploads.strikinglycdn.com/files/1d236734-41e6-45a2-aa34-98dbaca3140d/lafawafiwowulejaba.pdf
    • https://s3.amazonaws.com/tedowafomaru/99716011844.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/6618902649.pdf
    • https://uploads.strikinglycdn.com/files/6b7b48bf-fd14-4082-a468-be89446db5af/fly_fishing_tying_kits_beginners.pdf
    • https://uploads.strikinglycdn.com/files/7db9f8c7-9e17-4bbc-9f24-c4bdbacf070f/sadigifugozij.pdf
    • https://s3.amazonaws.com/vonusirukete/mutelisugesajivokat.pdf
    • https://s3.amazonaws.com/tevomenil/vezadeburilezave.pdf
    • https://uploads.strikinglycdn.com/files/f4209491-bbb4-4119-ad38-7ac96e58b5bc/jee_main_2016_online_question_paper_with_solution.pdf
    • https://uploads.strikinglycdn.com/files/6657414a-a6f9-43b2-a397-cd4a5dffcc67/what_age_should_read_the_chronicles_of_narnia.pdf
    • http://pamilov.epizy.com/jotolagujifa.pdf
    • https://uploads.strikinglycdn.com/files/ff286661-079a-4b2a-94ba-db18b130d0e6/lefunopemes.pdf
    • https://uploads.strikinglycdn.com/files/48f4b67a-2e1c-4272-a843-fb536c7c5d5e/66969487511.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_off0001046a.bin
5add2d36a6c1328e5792ccf3347c40143302eafb7bcf77af7bd5ad9525a26af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 5192 bytes
font_01_sfnt_off00011641.bin
6a7cbc1b8a0d0f27968d4b9274ea153d347430b7e4b7479504fe7caa38103fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 11208 bytes
font_02_sfnt_off00013cd6.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD6 16204 bytes

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