Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf624fb3d1b35be…

MALICIOUS

PDF

68.8 KB Created: 2021-02-22 16:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ced67dc6373fdf688d5b2671490ec4e5 SHA-1: 4d786a9763a80c88f71c4863b1e6d8b2998a0669 SHA-256: ecf624fb3d1b35bec8e580eb5a9643ebb5cfb256c14d14be3bb8c1e0fa3a5d9d
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, characteristic of a link farm or SEO manipulation scheme. The presence of external URIs and the ML classification suggest it may be used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 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.
  • 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://druttle.ru/wix?keyword=los+angeles+rams+subreddit PDF link annotation
    • https://cdn.sqhk.co/zibomevuguli/NtZQiig/josona.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gdjchfu/zombie_encounter_real_survival_shooter_3d_mod_apk.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/jotojoxe_vitaxejanoze_junugogudud.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/HgOhjgd/16417282384.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/0ggjgji/ruwikarafaxajiwu.pdfIn PDF document text
    • http://mmuuue.space/black_line_on_screen_laptopjo4as.pdfIn PDF document text
    • https://kisisegexorev.weebly.com/uploads/1/3/2/3/132302984/puzawazuvuz.pdfIn PDF document text
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/ce5c047085.pdfIn PDF document text
    • http://xurufotuzu.iblogger.org/vlc_blu_ray_media_player.pdfIn PDF document text
    • https://cdn.sqhk.co/miseseren/oVnFfic/vh1_shows_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/j05hfja/red_white_and_blue_balloons_clipart.pdfIn PDF document text
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/7594198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bokatamekal.rf.gd/atenolol_performance_anxiety_dosage.pdfIn PDF document text
    • http://mosiwifu.epizy.com/8826897413.pdfIn PDF document text
    • http://xedovafimolodem.epizy.com/94590475854.pdfIn PDF document text
    • http://jigabez.epizy.com/koripigar.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/assassin_s_creed_black_flag_2d_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EA 5228 bytes
SHA-256: 2df81735a40e53fba3d94913d8c36727923e89595d2d073e6626bd753f582287
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 1852 bytes
SHA-256: cefa93ab99268b9387626336cc8aeb986d802f3a091f6156c231f0642977bfab
font_02_sfnt_off0000e26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 10476 bytes
SHA-256: f5a22800191fff698e4dd2ec6adfcf7a09d80926100e4c2f353b3c785a44ebb0

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