Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f84f24bebf0c9f…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 07:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4bcc5b60d97dffc064afa6b8460627f6 SHA-1: 271f1dd23e635ffa343bd648b77e088feaa38db5 SHA-256: a3f84f24bebf0c9ff5369ee93e70043c0a0ea18e02e351abeeefc56446720d8d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, appears to be related to search keywords, further supporting the lure of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=how+to+get+to+inspiration+point+santa+barbara PDF link annotation
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/35eaa3c0e7.pdfIn PDF document text
    • http://youralteragoods.com/barrons_ap_music_theory_textbooktuw8i.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/5438246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5ffd770554049.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/Chegghh/learn_how_to_play_piano_free_download.pdfIn PDF document text
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/komexigufusufi.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwodemo/hjLQjeQ/blue_birthday_balloons_gif.pdfIn PDF document text
    • http://3-bureaureport.info/how_to_install_hardwired_smoke_and_carbon_monoxide_detectors5ujb9.pdfIn PDF document text
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/kuveruk_jaludegawit_gadukixojediki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_602876e1cc55b.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/hiXWA2n/jekupe.pdfIn PDF document text
    • https://cdn.sqhk.co/nelenikarate/5jbiejf/nofevaxalizile.pdfIn PDF document text
    • http://nikecortez.net/arabic_keyboard_for_android_tablet6ybkp.pdfIn PDF document text
    • http://grampus-shop.com/ajanta_caves_paintingsr0ycx.pdfIn PDF document text
    • http://turekawetareju.iblogger.org/hoover_carpet_cleaner_tank_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5ff201dbeef32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_6019c55873e93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafozega.rf.gd/bulipodetetibagefagas.pdfIn PDF document text
    • http://bewosekoxosegoz.rf.gd/97730913960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a7f202-1a78-4a91-b6e8-364078ed4cf8/dd_5e_magic_item_list_by_rarity.pdfIn PDF document text
    • http://nuzesadoz.rf.gd/mafexemovizapaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26126fc-b8ce-4f86-b4cd-7ccd044a194b/lifoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b38b69-b3b8-4d5f-bdd4-150dbfb727f8/sketching_from_the_imagination_anime__manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478536cb-f8de-4a7d-bad6-e0c61a2d5398/32613436388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c64494-5cf8-454b-9ee0-2e7e830cdf10/sunaxol.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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 5148 bytes
SHA-256: be266e39f8dd02149373fdebf3778c1856f1b0514e9054dee4c30664812987ce
font_01_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 11904 bytes
SHA-256: df9fe54be3c5dd1281be82fa5544ca9c2d4bf63d9c67a47bac0abe054c579519