Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff2e13c632973e3…

MALICIOUS

PDF

85.3 KB Created: 2021-03-15 00:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d529088bc2b21d1bfe30c5d9a6c248a3 SHA-1: 53c68ef7916dce214fb622c931e37a65cd29f594 SHA-256: 2ff2e13c632973e3c3b0ae9f9ad2cbebe598670fc1ccc150573875a465090676
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution lure, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=powershot+stapler+repair+manual PDF link annotation
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/susazi_bakoraxakeki_wusaw_susibiwu.pdfIn PDF document text
    • http://fineagencyy.com/napenakumvwvt.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/tepog-vulal.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/setuxirolata-togudoj.pdfIn PDF document text
    • https://cdn.sqhk.co/ramejolir/siifR2r/ludogorets_arena_2019.pdfIn PDF document text
    • https://notususapi.weebly.com/uploads/1/3/4/0/134012365/cf00f148d4f6d.pdfIn PDF document text
    • http://reduslim-ufficialesito.site/atif_aslam_all_video_songs_youtubeul9mb.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/ijjJZrY/commander_s_palace_new_orleans_menu.pdfIn PDF document text
    • http://ogranicbio.space/cute_kitten_christmas_cardsciilw.pdfIn PDF document text
    • http://startask.ru/30518750147voxy0.pdfIn PDF document text
    • http://abanca-electronica.com/magic_mouse_2_not_responding_well9jpbv.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/lowalorabiriwo-ganutipaza-netovikitus-soruluturamap.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/7007350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5fdf7f4e5a67f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_600a644b1d812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_5fd34cc452f7d.pdfIn PDF document text
    • https://tibomomaludo.weebly.com/uploads/1/3/0/9/130969572/venumigugegesupij.pdfIn PDF document text
    • https://navigawagin.weebly.com/uploads/1/3/4/6/134653302/2561709.pdfIn PDF document text
    • http://svoydvalend.xyz/rugby_world_cup_2019_tv_coverage_nzra2np.pdfIn PDF document text
    • https://boxusuvibirux.weebly.com/uploads/1/3/5/3/135308560/599926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011cff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11CFF 23304 bytes
SHA-256: c5288ee2174a5a374223e1ad5bb604bb99cfbda4c3940db47f91c45a99ed47ac
font_00_sfnt_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 5152 bytes
SHA-256: 618d5fc9e2f5ebb65a48bc921dc4da409ef671603f1d8ce42d17225a77174cb6
font_01_sfnt_off0000f871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 10652 bytes
SHA-256: 3ac4a098016116957b7cbcaa9cee7f6fc76d32e23d9e2625b00228ea41bae70b