Malicious PDF — malware analysis report

Static analysis result for SHA-256 4310a32bfb225abf…

MALICIOUS

PDF

71.5 KB Created: 2021-02-13 02:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a20d948d727edcca60eaac9ff3ced978 SHA-1: 659007e2609c41ecab6694eba2eccc4000ee4e78 SHA-256: 4310a32bfb225abf96dcda5faaaadf724e59b584fa3da634bf771bdd6e2e708f
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though truncated and obfuscated, contains keywords related to 'hay day hack', indicating a lure for potentially fraudulent content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=hay+day+hack+without+human+verification+2020 PDF link annotation
    • https://cdn.sqhk.co/zenekukera/HEidFji/manchester_nh_emergency_alerts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fd3b16a8384f.pdfIn PDF document text
    • https://guxemufisi.weebly.com/uploads/1/3/2/7/132710659/0556b0b5.pdfIn PDF document text
    • http://istlan.fun/55869594128cclbk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5fef5028bcfba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_6011abe3ae73e.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/8376881455025kae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5ffba1c4c9497.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/geGnV8l/xowajimipaxevi.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/sgemieh/lenovo_laptops_yoga_c930.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/tv_show_guide_australia8z9b2.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ihgdhig/stickman_skate_battle_hack_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/WchfMPx/island_park_idaho_hotels_motels.pdfIn PDF document text
    • https://cdn.sqhk.co/nogegamapagi/jhBLZ69/flashlight_on_iphone_11_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/hbFkDjg/wood_cutting_service_cork.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/2d73e973756a.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/SDcUtnZ/archery_target_stand_plans.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 5604 bytes
SHA-256: 9d33d21e82511bfeab46b4c98137dadce58513ba6558cf54948f7072925df7f0
font_01_sfnt_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off0000ed36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 10184 bytes
SHA-256: 1f276d9025aea07f9b664530b41f0cf9128b57fbcbd62a7dde34909974ba1a5c

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