Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5aed009ad45dfc0…

MALICIOUS

PDF

138.9 KB Created: 2021-03-15 11:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ab37b7dc11fadeeeda3a40006622cc65 SHA-1: 4a9c6b4467f644e769f80f9c764de90f8f9cf996 SHA-256: f5aed009ad45dfc064b77b592e52932ae8e1797d34f07e640eaf7f813bd31763
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a phishing lure or a gateway to further malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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 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.
  • 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://ponafet.ru/award?keyword=anorexia+y+bulimia+tratamiento+nutricional+pdf PDF link annotation
    • http://lynciguest.com/maze_runner_the_scorch_trials_full_movie_download_in_hindi_300mb6dfqj.pdfIn PDF document text
    • http://rizurajubo.22web.org/vuwujovujuzuvemi.pdfIn PDF document text
    • http://forecast.bet/63236921503ortmk.pdfIn PDF document text
    • http://balifruit.com/star_trek_discovery_season_3_episode_6_synopsis6upcd.pdfIn PDF document text
    • http://jobware.pro/grade_10_physical_science_textbooks73x1x.pdfIn PDF document text
    • http://dusixose.22web.org/when_does_guardant_health_report_earnings.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/0Fmicgd/xokegorunami.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/hggNjat/wifalu.pdfIn PDF document text
    • http://idealicaufficiale.website/fofolirumatiziip8uz.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/jRjgSj4/online_tool_for_passport_photo.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_3494ae1f16284d4e91645c8ee04629dd.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_b9c9b97821634ef49c58e0c2ce93faaa.pdf?index=trueIn PDF document text
    • http://rereroma.epizy.com/lange_case_files_emergency_medicine.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_1c6b1c8f13434f63a31d91294773d837.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f09620b-9695-4a1f-9109-6011f8ee62b3/4876148924.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_16ca216a9e4645e9aedfe065843a5789.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bca7ba-7750-425e-8919-729e090e20b7/11206228857.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_bf48d1e8e5ea46bbb7131523c880c89d.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_0124f1f6ea4a4e43a1ff9a9a6d8ea60b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17e90bf-90c8-44e5-b7d0-2e926073fb9a/bofuwufepopojufan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08900c91-1117-4b6d-93c1-162cce06542d/35961622784.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_050344f99dd54dd5bd281a43e56c39c4.pdf?index=trueIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_ab862479e4e04e0cb988a87d10915e46.pdf?index=trueIn PDF document text
    • http://ludekakub.epizy.com/parrot_bluetooth_car_kit_music.pdfIn PDF document text
    • http://zawipikeg.rf.gd/how_to_change_ink_on_canon_tr8520.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_47b269e0fc2d4a19b1e1c25c21bf02a2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5A4 1872 bytes
SHA-256: 9fba9b0d9e2cc48f58c52755440c9a9bb3bd4c5dbe3d8c853d7e81cca7fbdf20
font_01_sfnt_off0001de99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE99 5420 bytes
SHA-256: 231285d313e06db285812bebcb1d213742e02f6089aacf504e4b77894c2e40b9
font_02_sfnt_off0001f0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0FE 13924 bytes
SHA-256: 412b151b76ee32f844339a01703cba8006eeb4a1074612eec2584e7680318c4a

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