Malicious PDF — malware analysis report

Static analysis result for SHA-256 3005c97863aee8ef…

MALICIOUS

PDF

68.0 KB Created: 2021-03-19 14:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d0680a6ab3cf9a72ec737693484d5cb SHA-1: ddca8440307795477b866240e4bf29d9485f8c68 SHA-256: 3005c97863aee8ef9ef23ee7085fafff38e7494e2faf86c2a012d06c1fe8a837
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'psychology 1010 test'. The primary attack pattern involves directing users to malicious URLs, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=psychology+1010+test+4
    • http://copyrightnotices-form.com/96070772304ucys5.pdf
    • http://kokolonesafu.getenjoyment.net/a_dozen_a_day_preparatory_book_download.pdf
    • http://wivikaxebox.medianewsonline.com/32264306240.pdf
    • http://bagajuz.iblogger.org/sony_crackle_apk_2019.pdf
    • http://lnstagramverifycentre.com/singer_fashion_mate_bobbin_coversp337.pdf
    • https://cdn.sqhk.co/zarepowake/jggjiia/viruni.pdf
    • http://micrometer25bill.site/32299541100o4dve.pdf
    • http://itravelimpressions.com/hi_tech_syrup_for_saleuffvx.pdf
    • https://cdn.sqhk.co/livefivepa/hhihDic/jixaxapivixixulile.pdf
    • http://bukenisefino.mygamesonline.org/bluecoats_2020_snare_music.pdf
    • http://fortuneo-enligne.com/hill_climb_racing_3_gamel6t5c.pdf
    • https://cdn.sqhk.co/nugizape/ifxjbjj/rally_runner_endless_racing.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2d00e97b-dda4-4e6d-a5d3-58978cb17cc7/dell_8300_xps_specs.pdf
    • https://uploads.strikinglycdn.com/files/3a108de6-84a3-44c8-841f-6df380d52376/vaxekijunedudewaxepi.pdf
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_09ce05f954344486a40cb3272e7246a8.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_4b07e4118fcd442ba7fb3a4d7a927386.pdf?index=true
    • http://nejesezape.myartsonline.com/d-link_dir-655b1_manual.pdf
    • http://nokizotef.rf.gd/wegokarufos.pdf
    • https://uploads.strikinglycdn.com/files/2fdd4a2c-6916-472f-8d63-73c3114e8b5e/inductrix_fpv_plus_manual.pdf
    • http://vorenetizufumuj.rf.gd/pugexetotewilewuru.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_off0000cb4a.bin
4dd5bd990e029f080c9f6d400a147193a989f20e9ff755dd036ad77de08813ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 5140 bytes
font_01_sfnt_off0000dce3.bin
a581f8cbf3f3cf85417d29f32b8c0e05e9bc9cddff4a4da82826ac097c63e719		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 11208 bytes

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