Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f75680818cef17…

MALICIOUS

PDF

89.9 KB Created: 2021-03-27 20:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4bc9a0ec3c44566f2c68f6014c11cae SHA-1: d314b00eadc91fea71efe6a900410b988e5e6b96 SHA-256: f8f75680818cef17de4246f9fd7b39ae95c72560b9922e76f888f918ad56594e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to 'anatomia y fisiologia pdf'. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=aparato+reproductor+masculino+anatomia+y+fisiologia+pdf
    • https://cdn.sqhk.co/mukujoripu/gijhhfz/ropepixariludovukobiveji.pdf
    • https://cdn.sqhk.co/zetoxezoza/gciidhf/cmos_datasheet.pdf
    • http://tekufebuxu.iblogger.org/xupozuniratojuxirolebav.pdf
    • http://pirunumilusarib.sportsontheweb.net/99402150107.pdf
    • https://cdn.sqhk.co/gebunemif/jamjjWB/69086637330.pdf
    • http://jewogipuwivi.medianewsonline.com/14294813081.pdf
    • https://cdn.sqhk.co/savekedeg/3idhaXD/11867340967.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/satuja/does_michael_corleone_die_in_godfather_3.pdf
    • https://uploads.strikinglycdn.com/files/74da5d86-2b82-4756-93f7-2d4ec85c7d7e/what_is_the_average_salary_for_a_junior_graphic_designer.pdf
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_fc5e0bff15eb45549bebef643bd4674e.pdf?index=true
    • http://gajovab.epizy.com/best_mobile_ringtone.pdf
    • https://s3.amazonaws.com/xirixepo/carnivores_2_pc_game_free.pdf
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_57c9c12b74fe489c889bde372ca31a43.pdf?index=true
    • https://s3.amazonaws.com/libeganot/jekelotirukonogawebewij.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_7504217bb30f49c7be23c019a9779662.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d4e31d54-18c4-41da-8ff1-66052377eba0/does_xfinity_have_security_cameras.pdf
    • http://bototiluwoge.atwebpages.com/16210627877.pdf
    • https://uploads.strikinglycdn.com/files/a44db44f-d43d-4222-a42f-7d6e69572c90/how_to_replace_lost_ms_drivers_license.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_cb78daf54f6f47c79fae71d607a94693.pdf?index=true
    • https://s3.amazonaws.com/pexodugosa/fogevitavibija.pdf
    • https://uploads.strikinglycdn.com/files/94946c82-fb3b-4166-8b4c-5f61c5306866/what_is_the_meaning_and_definition_of_conflict_resolution.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f6c.bin
e8ea59659bfec30394569a4e1f1848bce3050c51715faaf314eddd426c0d8aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 5448 bytes
font_01_sfnt_off000121e0.bin
83627c6a7ae02f7c64580150694ba82d226adb28a29b81dd5caba20a609efb6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 12344 bytes
font_02_sfnt_off000149d0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149D0 4324 bytes

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