Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac5652e96daf35c…

MALICIOUS

PDF

82.4 KB Created: 2021-07-21 15:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1cc98423e68ab7e67655f9b75862053d SHA-1: ea7ae6233aed7e19a3bdfb8521717ec52efc3a3f SHA-256: 7ac5652e96daf35cedbb0cc7bf453bfb2ab5684d0446bfc61a0a07b26d39e7b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URI pointing to 'synerhu.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • 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://synerhu.ru/square?utm_term=frankie%27s+pizza+and+grill
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e78040158187605e5925b6/1625784384158/81617002788.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f7510d2d95f469380d2c87/1626820877975/home_again_quotes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1129a1d653208009af965/1626411675027/97323246074.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fd6a320dbd0de27fbf42/1625881962427/82743639001.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eff3df6611482e0a905fd6/1626338271282/reoccuring_anal_fissure.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edd7a5d9d5ad70ebd1bd40/1626199973297/50393581359.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f19cdc59fa603de82df45d/1626447068864/which_resource_management_task_includes_activating_local_requirements_if_available.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0f071f51426150c9aecf/1626214152133/rufagakivovivebugojafil.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f569bd7121636e99b97b45/1626696125993/overdetermined_linear_system.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f21784a9adb7280399b839/1626478468601/75614821280.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f7f78c25f0714c528e0a94/1626863500794/95433498681.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91f68db8bb141bad9508d/1625890664261/what_gets_permanent_marker_off_walls.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca905a1b53f2c22619807/1626122502062/for_honor_installing_game_content_ps4.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca8f9c81c37306b325a99/1626122489863/kuwerifevexobizenukofiv.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2f2f9b84a576e6cfb5190/1626534649408/63063237410.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec83ad8bb04542cee49230/1626112942055/xitefimadirazobop.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8169c8592fe3a589404e6/1625822876984/valentine_pic_for_husband.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f6f8415b4d7f5e3cbade60/1626798146113/23654066619.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec76f220781e4bb11aa5c1/1626109682319/kewopakuzatufir.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6534f2fd42108f73ffcad/1626755919530/bodoxezoboxodetomun.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee27017dee9f188f76fd05/1626220289815/64390284144.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec91b19c874e714248dd6e/1626116529960/virajiruwitafitoto.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFB 16792 bytes
font_01_sfnt_off0000f712.bin
af22d1c552ba4831ab91399b6b0c9b3b20eb8a11e0ebd83803fe69feaf59f53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10512 bytes
font_02_sfnt_off00010edf.bin
89161c00eb5d25f8e2b29ef0b24801594ab3e7e184c12aef03bddadbffe04976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 17444 bytes

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