Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7579435da86f60f…

MALICIOUS

PDF

82.4 KB Created: 2021-03-21 06:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dd1c67c88d4c3ec6a8bcd52d6826d3fb SHA-1: 313f722b11038e4f05e2f4cb4f27b8c3489b8346 SHA-256: e7579435da86f60f0d7ee19061b19d9c84493c58559c601fc0439510a951ffa7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating it is a phishing lure, specifically impersonating the Instagram brand to trick users into downloading an application. The document body, though heavily obfuscated, contains keywords related to 'instagram apk download'. Several external URLs are present, including one pointing to a redirector that leads to a PDF file, suggesting a multi-stage download or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://suwelebebos.weebly.com/uploads/1/3/5/9/135959353/renerafutituwas.pdf.
  • 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://zajinet.ru/wix?keyword=turbo+followers+for+instagram+apk+download PDF link annotation
    • http://wamijuw.22web.org/new_paris_metro_map.pdfIn PDF document text
    • https://suwelebebos.weebly.com/uploads/1/3/5/9/135959353/renerafutituwas.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/iimeVhh/bapilenozepamakopise.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/how_to_check_toner_level_in_brother_printer.pdfIn PDF document text
    • http://govusinixarimi.iblogger.org/canon_powershot_elph_160_camera_manual.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/c177d59ae0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/h6tLH3b/90303890096.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/2738539266.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/48505713090.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/5ttgfra/48611441011.pdfIn PDF document text
    • https://mulofujuxemo.weebly.com/uploads/1/3/0/8/130874025/xogavubagajob-puferunudebumem-sigudof-bafoz.pdfIn PDF document text
    • http://bibilewixan.iblogger.org/lexisituxirewuwabuxekelop.pdfIn PDF document text
    • http://xumarageli.22web.org/1322056253.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/xopetirikunukevisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://besipopi.epizy.com/classifying_chemical_reactions_worksheet_answers_page_105.pdfIn PDF document text
    • http://febiked.rf.gd/advaita_vedanta_in_bengali.pdfIn PDF document text
    • http://wepirizifomonij.epizy.com/drakor_beautiful_reborn_flower_sub_indo.pdfIn PDF document text
    • http://nezugetojuf.myartsonline.com/canales_de_comunicacion_marketing.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/rubutigogifijafenonuji.pdfIn PDF document text
    • http://faperolakaf.rf.gd/julius_k9_power_harness_size_guide.pdfIn PDF document text
    • http://werewej.epizy.com/how_to_fix_a_milwaukee_battery.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_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 5488 bytes
SHA-256: 9d42256cad414ba23c3c36c48b75b528bc8ed329cda4c0643d1e3c3ccec47f06
font_01_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 11164 bytes
SHA-256: 3b600ab89c900beec578475677e83504f6ec7386499bcb63eb1e0314f3bf85c9
font_02_sfnt_off00012e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E15 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71