Malicious PDF — malware analysis report

Static analysis result for SHA-256 beee0a05efaf8121…

MALICIOUS

PDF

80.0 KB Created: 2021-03-05 14:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: eaf47e400b620e2835ef8de85b78d637 SHA-1: e77af1b06b4100d7628ae3b2292f0b87b440e347 SHA-256: beee0a05efaf8121e644478c0f14d3685809816923efe9f030545ccf07e6227b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily corrupted, suggests a lure related to mathematical functions, which is likely a pretext to drive users to these external links. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect users to potentially malicious content.

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://jacksth.ru/wb?keyword=what%20is%20relation%20and%20function%20in%20mathematics PDF link annotation
    • https://nobozemesatib.weebly.com/uploads/1/3/0/8/130874372/5690520.pdfIn PDF document text
    • http://atelier-spb.com/ramogubiwotog7iksa.pdfIn PDF document text
    • http://huaweistoreukr.xyz/how_to_find_audio_drivers9elsw.pdfIn PDF document text
    • http://academic-club.ru/nugerowomalekuwipimavufo0o3cw.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/6ca9a430.pdfIn PDF document text
    • http://milesnires.xyz/gmail_infector_2016_v2.0a1i1x.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/salobuwokupavegugo.pdfIn PDF document text
    • https://tupodoki.weebly.com/uploads/1/3/0/7/130776149/rozesafa.pdfIn PDF document text
    • http://zesamoa.online/98203162768lpcbe.pdfIn PDF document text
    • http://trells.space/172515139785m0n8.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/xadirepagadesibifoferido6khx2.pdfIn PDF document text
    • http://gayerkan.com/masuwujapasazam3lyz.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/gray_sheet_eating_plan.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/84339554210.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/huckleberry_finn_chapter_20-25_summary.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/how_to_open_my_little_steamer_go_mini.pdfIn PDF document text
    • https://rodusebit.weebly.com/uploads/1/3/0/8/130874039/wowivefopevav.pdfIn PDF document text
    • http://jumpfs.space/the_greatest_salesman_in_the_world_movieu207m.pdfIn PDF document text
    • http://smotrikino.fun/269958167800ty69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fogevodazeta.epizy.com/logo_animation_after_effects_template.pdfIn PDF document text
    • http://rinodinejepezoj.rf.gd/tandem_airplane_wing_configuration.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/44455846495.pdfIn PDF document text
    • http://sopenexu.epizy.com/storyboard_project_instructions.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_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 5272 bytes
SHA-256: 37f38e584567f348274d803877820990a204f389cbe0862205051d876ef7e599
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 10452 bytes
SHA-256: 6f0d0cab3f2dc6fd915b128ac8c08084f4b8badec23376c95679964f60db84e1

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