Malicious PDF — malware analysis report

Static analysis result for SHA-256 0078c8ced14c4e06…

MALICIOUS

PDF

75.6 KB Created: 2021-03-28 14:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 528be234e68d6b2c76e2012235a076ea SHA-1: d077f79617a3d046bd795a16eced2a85b929abed SHA-256: 0078c8ced14c4e064d32339d5cc674e74fcd81d9712906f687235f4173129c15
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing operation. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious websites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=mechanical+engineer+resume+pdf+india
    • https://cdn.sqhk.co/baxoladipezu/hehdjgS/spaceballs_trailer_ita.pdf
    • http://zoomita.fun/can_you_get_a_dating_scan_at_7_weekskrjtr.pdf
    • http://medgaj.com/gunanenejemikekusapunamizxqoa.pdf
    • http://esclub.info/jixamaviz96ej.pdf
    • http://my-favshopg.online/495677842368zxhg.pdf
    • https://cdn.sqhk.co/nokotadi/36c0o7u/47893837708.pdf
    • http://tehnikator.ru/bmw_e30_bentley_service_manualz7odt.pdf
    • https://cdn.sqhk.co/pazaxefuma/uLhbh8U/ruzevunaxigikito.pdf
    • https://cdn.sqhk.co/bitaxukezor/jd7ejbi/healthy_gluten_free_mug_cake_recipes.pdf
    • https://cdn.sqhk.co/wevexifimur/T7x4iOd/club_car_shifter_cable.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_781f0bebbb524b33ac244a79e9fb578b.pdf?index=true
    • https://s3.amazonaws.com/xubifupi/rurikoriwurig.pdf
    • https://s3.amazonaws.com/nazekisigiduz/college_brag_sheet_example.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/jefojetesivezokamegaro.pdf
    • https://s3.amazonaws.com/wifukedot/creative_sound_blaster_x-fi_surround_5.1_pro_usb_audio.pdf
    • http://kubudafexajik.rf.gd/aplikasi_messenger_lite_terbaru_2019.pdf
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_0a7f5f860c9a478f9baa0da8bced8bd8.pdf?index=true
    • https://s3.amazonaws.com/vatosolikijike/gadolevapijivolulukanuti.pdf
    • http://jokilezitewoj.epizy.com/fajogowom.pdf
    • http://borarujedumamut.epizy.com/97829977665.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_off0000e9d2.bin
fa0a535f6f8ee36c417849d33012bdfa378994d341dac2c4bd785566e1cb99be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5572 bytes
font_01_sfnt_off0000fca8.bin
96df0849843f53ba49cdd8c1a1748da003633ef7d334bb6e8a6f8ceb1e31cdb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 10660 bytes

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