Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfde99b7f1ec029…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 21:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51f4bc6d470609094523aada1b243a0 SHA-1: 956cfad8bd72f727072f3b56200fe8bb73146d69 SHA-256: 8bfde99b7f1ec02937764c2aa5620a64c5b6c525790cb842cd5b6ff5ad0158e1
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing or SEO spam. The primary URL, 'https://jumiwimov.ru/strik?utm_term=how+to+clean+jandy+chlorinator+cell', suggests a lure related to search engine optimization or a phishing attempt disguised as helpful content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=how+to+clean+jandy+chlorinator+cell
    • https://cdn.sqhk.co/xuvisisitinu/djclYtm/kipagiguradatif.pdf
    • https://zulanamojo.weebly.com/uploads/1/3/1/0/131071117/revejagufarax.pdf
    • https://cdn.sqhk.co/zubafena/yjcPhbU/yuntum_movie_song.pdf
    • https://lukozosa.weebly.com/uploads/1/3/4/4/134485969/9900170.pdf
    • https://cdn.sqhk.co/vedukosamo/jfij0C5/how_to_swing_flies_for_salmon.pdf
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/e6c00e.pdf
    • https://cdn.sqhk.co/tumupowe/ggeQjbo/mowip.pdf
    • https://cdn.sqhk.co/junulevi/PhcnNje/tawonekumum.pdf
    • https://cdn.sqhk.co/femokuxajuz/hivgfia/mulobivexu.pdf
    • https://cdn.sqhk.co/zazerejaxu/hfhjKid/simple_cake_decoration_pics.pdf
    • https://ridimejaxokixis.weebly.com/uploads/1/3/5/3/135340331/864a468129.pdf
    • https://cdn.sqhk.co/kerutadit/Shhhjld/cosmic_energy_meaning_in_tamil.pdf
    • https://cdn.sqhk.co/xejadukoxeta/gcFcRja/nanofukotisateja.pdf
    • https://cdn.sqhk.co/vewukiziwemi/qQgcjgy/jukun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0f2ae8b8-76f1-4d58-9595-941005e66bed/51555650800.pdf
    • https://s3.amazonaws.com/jefazaxal/96105271661.pdf
    • https://uploads.strikinglycdn.com/files/bb4fd232-c96c-4341-8a6f-3d02fc7b1f34/rezuwapewafik.pdf
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_3917dee825294985bf32709a9d2d6a9b.pdf?index=true
    • https://s3.amazonaws.com/viboxikuz/31873652991.pdf
    • https://uploads.strikinglycdn.com/files/4260b89a-820c-42d9-9c08-6728dd107035/breckwell_pellet_stove_control_board_repair.pdf
    • https://uploads.strikinglycdn.com/files/c3d7d980-fc45-4503-bc4e-14c16485ea72/what_time_will_the_rise_of_skywalker_trailer.pdf
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_b50b34d0c80d4dce84b294fde0fd3acc.pdf?index=true
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_fdb8b4524716492cb8685d2d2df96dcb.pdf?index=true
    • https://s3.amazonaws.com/zuwimadaneb/690519547.pdf
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_9b66887a10d647d6985932660d9331d8.pdf?index=true
    • https://s3.amazonaws.com/tuxutedi/deep_down_game_guide.pdf
    • https://uploads.strikinglycdn.com/files/11c6aecd-4ea2-4b93-9a53-55765f8f5c4f/does_cbt_work_for_anxiety_reddit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58a.bin
c29daf1082980009b9bf6e5eac0eaae0bb3aeb37445cefaf51707084df21bbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 5080 bytes
font_01_sfnt_off000106e0.bin
9b54cd8ef132ad461c5fc2e4919c8a0a196728164eb01d9bba1572c283649cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 10604 bytes

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