Malicious PDF — malware analysis report

Static analysis result for SHA-256 344359f6db190202…

MALICIOUS

PDF

101.9 KB Created: 2021-04-06 06:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c0ec12e548624d3e66d41dcaad6dc3e6 SHA-1: 5e65eb304f8b3e63374a74ee5b80544d16a38564 SHA-256: 344359f6db1902025cd8ce467eb2d33b673ef9e9816eef241f04d36d4efcc096
134 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that align with urgency lures, further supporting a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/wix?keyword=hulk+emoji+express+answers PDF link annotation
    • https://cdn.sqhk.co/nubalevuvem/Digyo5F/52038078694.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/ibhfIyH/bass_boosted_car_music_mix_2019_descargar.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/pijakow.pdfIn PDF document text
    • https://cdn.sqhk.co/mowamukar/vyibPr3/bitebibajiwa.pdfIn PDF document text
    • http://kyrgyztours.com/jeparogewexifuvediglvo3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fe5ab00d16c8.pdfIn PDF document text
    • https://vubisurajoguv.weebly.com/uploads/1/3/4/2/134265568/siwuxijozojudo.pdfIn PDF document text
    • http://letnesil.xyz/27799480376i5qyu.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/kemedirufifub.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/31823953233.pdfIn PDF document text
    • https://nikotegonekis.weebly.com/uploads/1/3/4/6/134628666/ac32cf33dca.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/boy_meets_girl.pdfIn PDF document text
    • https://nemoderi.weebly.com/uploads/1/3/2/3/132302766/77e49bed68.pdfIn PDF document text
    • http://spain50off.info/league_patch_notes_10.25twk9v.pdfIn PDF document text
    • http://puximosuse.iblogger.org/atrial_fibrillation_diagnosis_and_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_6003659a84ec5.pdfIn PDF document text
    • https://bunutawopuzo.weebly.com/uploads/1/3/4/8/134868528/lepita.pdfIn PDF document text
    • http://cashfree.store/open_source_flowchart_software_linuxkiz9g.pdfIn PDF document text
    • http://www19216801.site/1602345376549wsx.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://xerekexaxo.epizy.com/case_in_point_10th_edition.pdfIn PDF document text
    • http://mivajale.rf.gd/discovery_objections_cheat_sheet_florida.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 5028 bytes
SHA-256: 39d401704cf0a19d1fdd991b765a0dd9694613eb37d27fc259cfcdabdd27dd76
font_01_sfnt_off00013aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA1 12676 bytes
SHA-256: 5dd41988f44649cd52b78879fa97848a672a8564e0cd967455461238fd68a8aa
font_02_sfnt_off0001658e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1658E 16112 bytes
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292
font_03_sfnt_off00017a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A5E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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