Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c62bedaeaa4bc13…

MALICIOUS

PDF

81.5 KB Created: 2021-03-07 13:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0c8225a0bfb21ec3fa41aea0f2069f9 SHA-1: 189ba7b6d839f06e691938fd815c16c2c0c5e60b SHA-256: 7c62bedaeaa4bc13360b1ab812af8797eed6770bb7aa78073d48e258bf6d2ba6
104 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure for downloading an Android application, indicated by the embedded URL and the 'SE_DOWNLOAD_BUTTON' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary IOC is the URL used in the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=download+bbm+apk+for+android
    • https://cdn.sqhk.co/xonizarisu/hczk8ia/66923155582.pdf
    • https://cdn.sqhk.co/luwanuriwaba/a8HCuje/voicemail_messages_delayed_on_iphone.pdf
    • http://zumepaposakuf.scienceontheweb.net/84687201200.pdf
    • https://cdn.sqhk.co/jesuzedavoti/hjdgiiZ/tezuramikovamej.pdf
    • https://rasabukogetak.weebly.com/uploads/1/3/1/6/131606550/6026075.pdf
    • http://chestlune.online/hisense_h6_series_reviewp0p4k.pdf
    • http://wimuzawoxi.getenjoyment.net/6476064305.pdf
    • http://zibikudupe.mywebcommunity.org/78930600835.pdf
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/buvebiguz.pdf
    • http://goldenframecollision.com/what_causes_a_leaking_overflow_pipe4jes6.pdf
    • https://fenawivo.weebly.com/uploads/1/3/4/0/134000055/2c607f57b2fb.pdf
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/e66ad.pdf
    • https://cdn.sqhk.co/pakiwujipubi/fWpjjgi/the_jumping_frog_of_calaveras_county.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xobebol.onlinewebshop.net/koxixefopasasimori.pdf
    • https://uploads.strikinglycdn.com/files/e2f89f46-7567-4a8f-87a6-ad16559a212b/how_to_fix_a_wobbly_kitchenaid_mixer.pdf
    • http://tapavakagazu.epizy.com/baby_sleeping_bag_temp_guide.pdf
    • https://uploads.strikinglycdn.com/files/93fadcb0-847a-47ff-8d2d-b579f508755b/singer_4562_t_bobbin.pdf
    • http://fanirivi.rf.gd/champion_korean_movie_subtitle.pdf
    • https://uploads.strikinglycdn.com/files/34b8fc7a-8e53-464d-b92c-7fcc5c2f0536/warhammer_40k_novels_to_read.pdf
    • http://radujexoxetapil.epizy.com/detroit_become_human_pc_igg.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_off0000eb2a.bin
83e0616471a42ea18428e76f2d12a3af4137e3a9405dba4549c581405a7d244b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 5304 bytes
font_01_sfnt_off0000fd3a.bin
e2c5227c9e3696dd6516ea1b8fa5781260ee73667ebedc3bbdb420866ba5c5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 11744 bytes
font_02_sfnt_off000123a4.bin
e7bbf0bca74f6ba17897bef3710127efb44abcf9298e3904bb3957032cc1d2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A4 16076 bytes

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