Malicious PDF — malware analysis report

Static analysis result for SHA-256 07333f8d56e484f2…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 04:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 77526318d17c70de34c3b53da708f5f7 SHA-1: 5218f07ec9dfd292d319df44a219e2b7aa398088 SHA-256: 07333f8d56e484f299567983053893c53e9ad14bea3c5460b1d998b7d1176b77
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the presence of many unknown-reputation URLs strongly indicate a malicious intent to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/award?keyword=assertiveness+training+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/buzomesil/hgw24he/43022381221.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/lupitiza.pdfIn PDF document text
    • http://fragcups.com/strength_training_anatomy_3rd_edition_downloadhn6jd.pdfIn PDF document text
    • https://jasofemelufes.weebly.com/uploads/1/3/0/7/130740231/5739138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ffd65f7cc5d6.pdfIn PDF document text
    • https://wuguruxozoza.weebly.com/uploads/1/3/4/0/134040539/teguxagit-xabolina-nimifeteturi.pdfIn PDF document text
    • http://health2health.online/29194078825xyqxs.pdfIn PDF document text
    • http://meetchat.space/captain_tsubasa_dream_team_beginner_guide5kb54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_60499424ea54a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375886/normal_6006c7d016650.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/fatibavigagomesa1nu0e.pdfIn PDF document text
    • http://sibivelemeruzu.iblogger.org/fujubolalebunojuzabago.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/fjiShb7/old_bengali_album_songs_free.pdfIn PDF document text
    • http://replyua.site/workplace_safety_inspection_reportjosv9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_605f35fa2125a.pdfIn PDF document text
    • http://lefuduzitenazig.22web.org/what_battery_does_garmin_vivofit_jr_use.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_602c04e369098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/443d974e-4c0c-4cd0-82d7-fae591a5e666/how_to_do_easy_science_experiments_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5354d893-951a-4358-9835-689eb0ca2e08/hp_no_scan_options.pdfIn PDF document text
    • http://zomufebike.epizy.com/89492733055.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 5184 bytes
SHA-256: 86dce5b7ef629cc5b4e0bd8b355ec6fa923c1233776f49da652f4c5b39de282c
font_01_sfnt_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 10712 bytes
SHA-256: c33d8f9d0fefb20fe490c6c65810bca7ba7b57e4312acefe052d552f40600b9a
font_02_sfnt_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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