Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8ff5fcf72507da…

MALICIOUS

PDF

93.9 KB Created: 2021-03-19 23:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d4b6577255b6737881e8d2bcb802d518 SHA-1: b3b698dad01fd692c37db37331ca1ad86d0963c9 SHA-256: 5f8ff5fcf72507dafcd252654fb3574c248624ba965266ee0a71b8d60159e824
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous external URIs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as lures to external malicious sites.

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
  • 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.
  • 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://fokemale.ru/123?utm_term=platform+film+ka+gana PDF link annotation
    • http://8gusevshop.space/popular_car_driving5c9lm.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/dJidVlu/16546923797.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/dgemhbP/gebafapuf.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/ifahdFe/donkey_kong_racing_gamecube.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/xhgchbx/lojivopokiziwoseko.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/hdsifav/lebara_mobile_top_up_voucher_10.pdfIn PDF document text
    • http://natorg.fun/gagevuxetizevsmlhv.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/idKhjge/guess_the_disney_character_quiz_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/haYW7gc/71765802329.pdfIn PDF document text
    • http://mubarominufu.iblogger.org/how_to_write_the_aim_of_a_research_paper.pdfIn PDF document text
    • http://axecheat1.xyz/how_to_get_started_with_audacityio9e1.pdfIn PDF document text
    • http://bit-ipo.ru/how_often_should_i_clean_my_masterbuilt_electric_smokerrl1fe.pdfIn PDF document text
    • http://discout.online/cha_cha_chat_appqfho2.pdfIn PDF document text
    • http://redit.fun/nibivonajitabuweg0pu5.pdfIn PDF document text
    • http://copyrights-notices-helps.com/why_is_hp_photosmart_not_printingzcsp5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://janalusexisowa.epizy.com/32151290351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6348e54-d004-4975-a664-ae81b33e26b8/xegigozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288b4a20-9718-4e2d-833d-97d0f5266d07/how_do_preschoolers_learn_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207d907f-2ffc-44fe-ad8e-74a1a0be354d/90935653664.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/how_to_bypass_activation_lock_on_ipod_touch_5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001353f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353F 4972 bytes
SHA-256: 22ebe8d6b2e65ba73b9d097211a29adf7ba9dd231c7781643b72344b9e8b6dd1
font_01_sfnt_off0001461b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461B 11072 bytes
SHA-256: 6cb5ec1b88c9443370aa5e71d1d0397aa39bd20b182890147c3600cd2cdf38b4

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