Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca46e4c61526316…

MALICIOUS

PDF

75.8 KB Created: 2021-03-27 22:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20285def97ebcad23c3a13f4a5f14dc3 SHA-1: e720bf87f0e7e6ca6d13a14e0a414109c0dca6ae SHA-256: fca46e4c61526316b6193f637723de68e21f547cdeadf59e2a7549397440f4be
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, with one example being https://xezojetit.ru/123. This suggests the document's primary purpose is to redirect users to potentially malicious or spam-related websites, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/123?utm_term=baby%2527+s+day+out+full+movie++1080p
    • https://cdn-cms.f-static.net/uploads/4415934/normal_602623874372f.pdf
    • http://zozitaze.mypressonline.com/the_holy_bible_catholic.pdf
    • https://cdn-cms.f-static.net/uploads/4485001/normal_603e6736e287d.pdf
    • https://cdn.sqhk.co/pibepufas/jhUDsie/61425129962.pdf
    • http://xomuxeje.22web.org/home_again_movie_hdpopcorns.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_6043fc342fc3d.pdf
    • https://cdn.sqhk.co/pazakazagoz/ifhdhcZ/ielts_listening_answer_sheet_idp_ielts.pdf
    • http://parazepurafeza.medianewsonline.com/cracking_the_pm_interview_gayle_laakmann_mcdowell.pdf
    • http://sepoxudozixo.sportsontheweb.net/lifofer.pdf
    • http://rewokujow.scienceontheweb.net/pesca_artesanal_definicion.pdf
    • https://cdn.sqhk.co/koditisalupe/8FoL62w/shadow_legends_stickman_revenge_hack_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4479435/normal_602de087738ed.pdf
    • https://cdn-cms.f-static.net/uploads/4381082/normal_6031f37af2cd4.pdf
    • https://static.s123-cdn-static.com/uploads/4428039/normal_5ff3f2a405a79.pdf
    • https://static.s123-cdn-static.com/uploads/4482860/normal_5fcbeca17bc0f.pdf
    • https://cdn.sqhk.co/kikolibub/YjhkY0s/kitten_running_around_at_night.pdf
    • https://cdn.sqhk.co/fubafonu/UDggjgW/weather_channel_live_stream_hurricane.pdf
    • https://cdn-cms.f-static.net/uploads/4370068/normal_605ef2200ad5d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xuwajapu.rf.gd/why_is_the_magna_carta_important_to_australia.pdf
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_0d83b207b411471199e5368c90fef0a3.pdf?index=true
    • http://pegowalinasaduk.rf.gd/background_color_code_android.pdf
    • http://dusuwuf.rf.gd/how_to_train_your_dragon_3_movie_clips.pdf
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_50719e190ba64ac6aa8a078f1e1f3fc8.pdf?index=true
    • 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_off0000e86f.bin
07b6bc32b0c8d3673679f18a7afc44c0757886f68bdf2393b44bf678dc64ab97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 5864 bytes
font_01_sfnt_off0000fc6c.bin
986a2e56fbf2da42796b6cad7e690e7b844a44b265f4c11ffc48a51de83d6000		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 11152 bytes

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