Malicious PDF — malware analysis report

Static analysis result for SHA-256 5629961f76d9ec6b…

MALICIOUS

PDF

76.1 KB Created: 2021-06-09 01:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec9f11ddfef6b9430f58cf1bd88b3c2 SHA-1: 7ab7fa0dfbd1b5e29c09cde81d47e34d8f6ead8f SHA-256: 5629961f76d9ec6b9c7e31b2e7d8b12f58f12d1205bec6d5d0f0871921d7f15b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'e2 book pdf free download', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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 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://huntic.ru/pbw?utm_term=e2+book+pdf+free+download
    • https://static.s123-cdn-static-d.com/uploads/4416932/normal_60b6a65fd67f5.pdf
    • https://cdn-cms.f-static.net/uploads/4378405/normal_600af05505bc6.pdf
    • https://cdn-cms.f-static.net/uploads/4471509/normal_60b96e560d30c.pdf
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/pipelopowevowil_towanetu.pdf
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/3654389e.pdf
    • https://gafepidata.weebly.com/uploads/1/3/0/7/130776025/7834246.pdf
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/2481271.pdf
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5fecc9668ae30.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fcdb2210b760.pdf
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60bc611c43552.pdf
    • https://kofudisefases.weebly.com/uploads/1/3/4/0/134018526/699dabf13a48368.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xalomuzavege.pbworks.com/w/file/fetch/144432588/15030958918.pdf
    • http://wasosux.pbworks.com/w/file/fetch/144883659/sosujuzuwedulida.pdf
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144874719/83986482462.pdf
    • http://katexawa.pbworks.com/f/66463870739.pdf
    • https://uploads.strikinglycdn.com/files/0bb71d16-a3af-42f0-913d-4f4c29e25743/37613674192.pdf
    • http://kapetipubi.pbworks.com/f/textos_mal_escritos_para_corregir.pdf
    • http://fevawigo.pbworks.com/f/bipemumup.pdf
    • http://najapenoz.pbworks.com/w/file/fetch/144898656/sirogebebinuleti.pdf
    • https://uploads.strikinglycdn.com/files/f0cdd7b8-8cd2-456f-9ce3-229688895a80/sedudekovar.pdf
    • http://lebamojopa.pbworks.com/f/stellar_phoenix_windows_data_recovery_software_activation_key_free_download.pdf
    • https://uploads.strikinglycdn.com/files/6f31ca25-0bba-4e17-ba48-07a5040073cd/pexevorevaguza.pdf
    • http://kedefoviraj.pbworks.com/w/file/fetch/144606780/gonazavotawuvibe.pdf
    • https://uploads.strikinglycdn.com/files/b0250074-5bb9-49c8-9b92-4640203a0a36/are_autopsy_reports_public_record_in_canada.pdf
    • http://tovemubu.pbworks.com/f/wrong_turn_4_tamil_dubbed_full_movie_collection.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc45.bin
89212e3ee011e2623b6bcae505bad8ec3061312f852b8824d6cc2f8eaa69f65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC45 3288 bytes
font_01_sfnt_off0000e809.bin
32677f424062893dcd9ae84c98bba0d39c873e770c4518fd2ac037581f1013fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 5244 bytes
font_02_sfnt_off0000fa07.bin
936cf652e5def476f6d180f48b365e021d394bf629fbad80fc1b34cdd983a98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 12152 bytes

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