Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bbe78b0adf78ab…

MALICIOUS

PDF

122.3 KB Created: 2021-03-09 07:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9cdcfe54925453d23ea90824c268fc9f SHA-1: 2d684a4dfcfaae7a438969a6039eed7a5a023aec SHA-256: b1bbe78b0adf78ab80a77f32bcee895a03512ee15a66800b5c32464e517ccbd2
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's part of a phishing campaign to trick users into downloading further payloads.

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://ponafet.ru/wix?keyword=tracker+boat+owners+manual+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fce62d72809b.pdfIn PDF document text
    • https://cdn.sqhk.co/saguregifu/dJjdEZ5/crown_the_empire_members.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403260/normal_5fe151369c484.pdfIn PDF document text
    • http://bridgecommerce.com/moleneledex8p2h.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/viiig5S/sculpt_it_board_game.pdfIn PDF document text
    • http://ueuniti.website/download_dungeon_madness_2_mod_apk1u4c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_602a386e2ebad.pdfIn PDF document text
    • http://santecmb-sarl.com/199086793946d2w.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/0jaFggo/lawumikuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/Fh1idgf/racing_go_kart_parts_list.pdfIn PDF document text
    • http://akmurzina.com/badami_bhutanatha_temple_informationxrb8v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_652490aa000b4d30add2c0efa49bc283.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/ruwuwalono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c854c709-7fe4-4444-a598-9e0277075c4c/pajivugujo.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/panchatantra_stories_in_telugu_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/denon_avr-2113ci_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/87317830783.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_cf8d85dce9d049c09d78fd858ef7bfc6.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_2910540f4738443b8c2b833489d95609.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30641c15-415a-48c7-ae0f-b80a69a3f3f6/54092457615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2061976-d9d0-4769-9d1a-df525f2ec3fe/54393000222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1d556b-5fb0-4427-8ed9-a51637383e7e/how_do_i_become_a_paid_guardian_ad_litem_in_sc.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_off00019e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E9E 5332 bytes
SHA-256: d028aabf5542a9d72a83f8fb994e55e783b32c5898964182f2a3d7cc962b875b
font_01_sfnt_off0001b0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0B6 13164 bytes
SHA-256: 0d13d54c498815c563d229d2f06a27855cc2e048da16ed1888b6e5730af04235

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