Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce92f9cc3c3fac09…

MALICIOUS

PDF

79.1 KB Created: 2021-03-16 17:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 083c2c1bbfb84f571bcf09e892ea0f29 SHA-1: ced9f67752af23a8a464ce104cc2a03f6c0e93d2 SHA-256: ce92f9cc3c3fac0996d600d073840e9fbdf990fd3719012b508d5f9942776fc2
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the phishing lure.

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://xezojetit.ru/wix?keyword=psiphon+pro+apk+download PDF link annotation
    • http://psyhologrzn.ru/5457398020ykwhf.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/limoxe-fonobeviw-takomiweb.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/medaziba_jetuxe_viluwosoz.pdfIn PDF document text
    • http://demask.fun/wiwotamueul.pdfIn PDF document text
    • http://ionatr.space/how_to_draw_realistic_portraits_with_pencilsddf0.pdfIn PDF document text
    • http://wownatural.fun/tufetuvazagiju9lb.pdfIn PDF document text
    • https://migaxodilex.weebly.com/uploads/1/3/4/8/134852634/girikud.pdfIn PDF document text
    • https://cdn.sqhk.co/sunolefe/hgehcgc/machinist_mate_second_class_study_guide.pdfIn PDF document text
    • http://air-calm2.club/58822068463n9v.pdfIn PDF document text
    • http://powerhdniy.space/95834462398jq935.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/iiiihah/1355866538.pdfIn PDF document text
    • http://mini-cam-v2.club/cullare_la_tempesta_sheet_musicx1bh2.pdfIn PDF document text
    • http://philonio.online/will_mcbride_show_me_photosxdie9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e867c2-a3a5-4cb7-a22d-a9c63746f9c4/31987515881.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/21234156388.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/data_structures_using_c_and_c_by_tanenbaum_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9630dde-df5d-4377-9e56-379313b9c147/edenpure_heater_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/platform_bed_frame_queen_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9bf3ed-c9b3-402a-a5a9-a3b24b3101f9/nikon_coolpix_p520_reference_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d5b83f-6a39-4195-b4db-a63b3f3631c2/wimivuvizod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 5204 bytes
SHA-256: f3383e4df08bf08480aa5e65ffa00c2a380d555dbc9592e8e172833ef3aaefd1
font_01_sfnt_off0001097e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097E 10608 bytes
SHA-256: 28f0875566853fd76356d8eb5225180b1dacdd220dfa7491c458331a9c4c859e

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