Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f2cfb3f58e140d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-15 14:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9080a1a2183eb0febc282dc505bd2550 SHA-1: e18729099cf18b3ab97251c5ec8fed5b7893b347 SHA-256: 89f2cfb3f58e140de351cacfb1aa6ed66279534cbf27bba6ba1081aa661c228d
174 Risk Score

Malware Insights

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

This PDF file was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating malicious intent. The presence of a payment redirection lure suggests a business-email-compromise pattern, aiming to trick users into making fraudulent payments or changing bank details. The embedded URLs point to external resources that likely host or facilitate the delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=adf.+ly+hack+apk
    • http://potenciy.xyz/378236370710jxrc.pdf
    • http://tinezukozaga.22web.org/why_does_my_hotpoint_dishwasher_keep_flashing.pdf
    • http://mmmuuuue.space/street_fighter_4_apk_all_charactersx8247.pdf
    • http://salopkisa.website/devuteewgr.pdf
    • http://zojulosopejozaz.iblogger.org/45045945048.pdf
    • https://cdn.sqhk.co/vefoxewijuja/eGfhc1A/whatsup_gold_installation_guide.pdf
    • http://thedefenseforge.com/68cra.pdf
    • https://cdn.sqhk.co/xadeviro/ejdjdib/kaiser_permanente_provider_login_california.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xejotapawadi.epizy.com/retro_arcade_games_apk.pdf
    • https://s3.amazonaws.com/fadedosi/blank_white_shirt_design_template.pdf
    • http://jagodamafa.rf.gd/guitar_chords_book.pdf
    • https://uploads.strikinglycdn.com/files/0abd9a74-f0a7-4a5c-850b-ed1b04cabf80/conversion_de_cm_a_pulgadas_formula.pdf
    • https://s3.amazonaws.com/bokelur/bonegudu.pdf
    • http://dulaxidej.epizy.com/bleacher_report_top_50.pdf
    • https://uploads.strikinglycdn.com/files/e5041807-2208-4ba5-b8b6-bd910fb10288/lowobatajoludawusan.pdf
    • http://dupubavamuwoxaz.rf.gd/star_trek_into_darkness_khan.pdf
    • https://uploads.strikinglycdn.com/files/ee4f15de-d5a7-42c9-ae80-b7d4c0fc1fe2/gatijifegavove.pdf
    • https://uploads.strikinglycdn.com/files/abda6a7d-de87-4dc1-81ee-8b9cdbaad20b/cake_bible_rose_levy_beranbaum_review.pdf
    • https://s3.amazonaws.com/fixararololu/50245765037.pdf
    • https://uploads.strikinglycdn.com/files/6d147630-a874-4889-a598-31a97856c90e/27915791163.pdf
    • 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_off0000f1dd.bin
41af1161c4d25d2aec8ac4655522ef566a271d6dc9125f363bfffadca1a73803		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 5156 bytes
font_01_sfnt_off0001037d.bin
a3b001a1984573718975309a202aa7b68560d36d2505f16a635a28bb3d09c0b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11344 bytes

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