Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad53f50d56a96ed8…

MALICIOUS

PDF

85.2 KB Created: 2021-01-28 03:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fe375b9f331c8b3b3e9c79b17aa70e22 SHA-1: fefa6da9f21c022c004395f906cc041dc9b90a84 SHA-256: ad53f50d56a96ed844a0a6153f9e3430808f6921b25120ffb6f0695f1e40c7ca
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to game hacks, suggesting a lure to trick users into visiting these malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=pet%20rescue%20saga%20hack%20game%20download In PDF document text
    • http://nazevulilabume.66ghz.com/14661778363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491946/normal_5fcd55d354a32.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/11fcb6bb6dec.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/ibhhHij/game_of_warriors_hack_version_download.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/mufinonosejagikereg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5fe59ad74edc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5ffabefd24936.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/watiwekabimimep.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/McH5Pgj/81428704528.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/5705126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_600f56abdf58f.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/gglhejc/scent_of_a_woman_speech_full_scene.pdfIn PDF document text
    • https://bugomalaked.weebly.com/uploads/1/3/5/3/135324661/3929931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovetijif/25725114911.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/fotogozawulu.pdfIn PDF document text
    • http://gotuziput.epizy.com/binomial_distribution_practice_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/lagu_percaya_aku_versi_dj.pdfIn PDF document text
    • http://dafiwogi.rf.gd/dragon_s_crown_pro_platinum_guide.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/rijutajanobesidis.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_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 10628 bytes
SHA-256: 574d20404338b519f397a0465d648a1756030d8a4af1c5c2e0af8cfc507044f7
font_01_sfnt_off00010e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 5508 bytes
SHA-256: d128b47babd9e2887e355a59fa9eadc29946361c2e5cdf6b13ceb9ded724f682
font_02_sfnt_off000120ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EA 11584 bytes
SHA-256: 4965e10776709fd0815d2ba96433aee0ada2de6523e2f02766a96a014245597d

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