Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb62c23611c16bf…

MALICIOUS

PDF

114.8 KB Created: 2021-03-18 08:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d93f165bfc3e5e9672a830e3af108f73 SHA-1: e2bc93a1f3bb6c8cc15ab67cd98e2c0c84a60cd5 SHA-256: bfb62c23611c16bffc204e8418ab136b72a558ba03433d2952384d8f7ca14eed
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely used for distributing malware or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a title that could be a lure, suggesting a phishing or malware distribution attempt.

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://dugedepap.ru/strik?utm_term=trials+of+apollo+the+burning+maze
    • http://paselon.getenjoyment.net/bteup_syllabus_2020_download.pdf
    • http://retys.space/easiest_way_to_make_pop_up_bookrqq63.pdf
    • http://rinusiwujegabu.medianewsonline.com/40628159830.pdf
    • http://stylecurtains.com/the_shackled_city_3._5oqd2o.pdf
    • https://vagofavom.weebly.com/uploads/1/3/4/4/134486407/pinobomura.pdf
    • http://nigavereke.mygamesonline.org/navy_blue_coat_outfit.pdf
    • https://wovitinukid.weebly.com/uploads/1/3/4/3/134372120/885dff.pdf
    • http://nejevefivi.mypressonline.com/what_does_yellow_light_mean_on_belkin_wifi_extender.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_523a1b7598554b8894cb9f20bb9658ab.pdf?index=true
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_88cbe864ebc94dfa839a49f9538bf894.pdf?index=true
    • https://s3.amazonaws.com/divelatoxa/how_to_transfer_mini_dv_tapes_to_computer.pdf
    • https://uploads.strikinglycdn.com/files/e66287f5-3ad4-4ad0-8a92-228363c85170/they_say_i_say_free.pdf
    • https://s3.amazonaws.com/sisaxu/house_of_spirits_book_club_discussion_questions.pdf
    • https://uploads.strikinglycdn.com/files/17b07476-9a59-47fe-99a0-c2c563b9bb28/sansa_clip_battery_not_charging.pdf
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_87189bac208c4b8481dc7cb724f6f3fb.pdf?index=true
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_d90b8c1aba0e467d868f893fe5a00483.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a528ddcb-548d-468e-a7ab-cd267237b42d/acer_chromebook_laptop_charger_walmart.pdf
    • https://s3.amazonaws.com/punagilelabon/biodata_format_for_marriage_for_girl_doc.pdf
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_1509c407ad60418990514c8c5786882b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/128267a3-e3de-4f4c-8d69-6c4a5a7dffe7/64639614652.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_off00018345.bin
af4e362c825058c4c723e2d72443cbe6511014e727fa0fc4f1a253a16feb9c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18345 5452 bytes
font_01_sfnt_off000195ab.bin
ba789a97e27771b8cada9a932401b6581e6453bb3dd9c2367089503eb3395b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195AB 11196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.