Malicious PDF — malware analysis report

Static analysis result for SHA-256 3877d9f9cd635bb9…

MALICIOUS

PDF

88.8 KB Created: 2021-03-09 11:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e84bc3a5dfc1d8f15980097df22b49 SHA-1: 499fcd51cfb6bb1f090520dad641becc69c113c3 SHA-256: 3877d9f9cd635bb9c66bc9e5a9a1494f521fde0c9ada3ad8fa6f091b1622eb13
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent to trick users into downloading harmful files. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://bologen.ru/wix?keyword=greater+boston+real+estate+board+lease+fillable
    • http://mifvideo.space/big_moe_s_diner_menuc9dyo.pdf
    • https://cdn.sqhk.co/sifalavuxozo/6cgdyQb/65071741561.pdf
    • http://wdd13.ru/can_you_drive_to_school_alone_with_a_permit_in_floridagvyzs.pdf
    • http://changepass.online/ladizenuwaxexim6ui0e.pdf
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/waloneg.pdf
    • http://lirudizulizi.iblogger.org/22441341379.pdf
    • https://cdn.sqhk.co/gewewoturila/rGhajK2/difficult_color_by_number_coloring_pages_for_adults.pdf
    • https://cdn.sqhk.co/kekelivig/gh4NjTg/4134954310.pdf
    • http://cleaner360.shop/rewalodz74w.pdf
    • https://cdn.sqhk.co/mixaluwekitu/e5Yje39/brent_crude_price_live_in_dollars_today.pdf
    • http://llloooodddd.space/92403558809ymqkt.pdf
    • http://particulieres-societegenerale.best/tipos_de_radicales_libreskb775.pdf
    • http://biomaniks.website/why_is_my_kidde_alarm_chirpingb2xg8.pdf
    • http://clyb-wylcan3.space/sony_sa-ct780_updaterz24c.pdf
    • https://cdn.sqhk.co/xejadukoxeta/eTibYhi/45343727422.pdf
    • https://jumabesabixoduz.weebly.com/uploads/1/3/4/3/134368642/bomikanozol.pdf
    • https://cdn.sqhk.co/virurewev/cNggYBZ/ww2_battle_simulator_mod_apk_unlimited_money.pdf
    • https://cdn.sqhk.co/vimewiki/aoNhgVX/poweramp_v3_skin_blue_dark_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pugetuwozijeso.rf.gd/wotowepufatewivezozazaju.pdf
    • http://medidadebi.rf.gd/98120966490.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_off00011eb7.bin
1a49fab9ab4bb55576d0cf7f99267c3b873f694d4d4f9c68de7c3d84c45b0bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 5072 bytes
font_01_sfnt_off00012fff.bin
81f5d4d8ff822f91f3bb7eea00cd0e73272d156406b2572d0088d1665bbf233a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 11060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.