Malicious PDF — malware analysis report

Static analysis result for SHA-256 5509e2fcd16a8093…

MALICIOUS

PDF

72.6 KB Created: 2021-03-14 06:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b59fae835ae48184f94778aedd50da5 SHA-1: d5fc2ff9fceb721ab3e646eeb9dc12caaeba0bcb SHA-256: 5509e2fcd16a8093b2c638699be33fc8292a4a96737b86c62128731363a24eec
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://midufefew.ru/award?keyword=bcc+cable+catalog+pdf
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fd072378d79d.pdf
    • http://marketitaly.info/what_is_a_center_of_dilation9oogv.pdf
    • https://cdn.sqhk.co/xewumoxu/Mijhigc/15167704366.pdf
    • https://static.s123-cdn-static.com/uploads/4483365/normal_60053ff6b4d95.pdf
    • http://ru-dev.xyz/what_is_the_best_holster_for_a_taurus_g2ciyftk.pdf
    • http://getfreecreditreport.info/mesemey1evr.pdf
    • http://rimka.xyz/depomulenipejemuzimuvenouu60z.pdf
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fdfd791c17e0.pdf
    • https://cdn.sqhk.co/vekuzajomugi/ghjfifa/rotten_to_the_core_lyrics.pdf
    • https://cdn.sqhk.co/wukiratuxazo/submxhc/viber_for_android_4._4._2.pdf
    • https://cdn.sqhk.co/fexejikexew/jiibU2S/easy_chocolate_mug_cake_recipe_no_cocoa_powder.pdf
    • http://lipejilun.iblogger.org/free_printable_calendar_templates_june_2018.pdf
    • https://cdn-cms.f-static.net/uploads/4383688/normal_60394a8919443.pdf
    • https://cdn.sqhk.co/wunasesev/jjeeNha/vikings_netflix_season_6_australia.pdf
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5fd92ee80f639.pdf
    • http://asta-stroy.ru/harry_potter_free_printable_stickers6aef0.pdf
    • https://cdn.sqhk.co/navotezive/SgjjgiH/sagodusepajig.pdf
    • https://cdn.sqhk.co/limizolaxa/BiajAge/tomato_bounce_game_online.pdf
    • https://cdn.sqhk.co/buzaxelubot/8tijxfK/zombify_zombie_photo_booth_apk.pdf
    • https://cdn.sqhk.co/bapisolel/4mtd6hf/19356669420.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_13851421b9f34f639dc3961983b6f4ce.pdf?index=true
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_28af6c12739248da908b86c3ffa24f36.pdf?index=true
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_3f2ab17772cf482cbcf0210def06225f.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_ff0461073320424db5e7f0e89756e2ba.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_896c1ec79a2f45b0a844ff1146db9820.pdf?index=true
    • http://voferinokubusob.rf.gd/sozilubupexataxilo.pdf
    • http://kuxexulotubi.epizy.com/access_report_dlookup_in_detail.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_off0000d2be.bin
788a1eb81d44c9689f9c110024e1257a5b0c3710e9694880be667104fb9ded62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 4872 bytes
font_01_sfnt_off0000e359.bin
5ccb991a5a43326d7560a68c6076b0d4a518fd6c2578351624414725470a4361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 10384 bytes
font_02_sfnt_off000106b9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 4324 bytes

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