Malicious PDF — malware analysis report

Static analysis result for SHA-256 422895919ad0b1bf…

MALICIOUS

PDF

86.4 KB Created: 2021-03-31 23:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03054ea4e52adae9fad3fbb3eb409e6f SHA-1: d37c8e958a839ae5ae7de26d80b1993feaa1c842 SHA-256: 422895919ad0b1bfb31a7d4f1f999f36c2343af396578ac98f143aded57951ae
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, suggests a lure related to PDF merging tools. The presence of external URIs and the ML classifier's high confidence score strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://xajibur.ru/award?keyword=fusionner+2+pdf+en+1+mac PDF link annotation
    • https://gefidiwe.weebly.com/uploads/1/3/0/7/130738847/mumubib-wukesenawo-pugele-taborurenumesam.pdfIn PDF document text
    • http://lagojituzolebuf.22web.org/strategic_asset_allocation_in_fixed_income_markets.pdfIn PDF document text
    • https://vekazapez.weebly.com/uploads/1/3/4/6/134601327/befojibobowozevususa.pdfIn PDF document text
    • http://fovorowo.22web.org/basics_of_computer_for_rrb_je.pdfIn PDF document text
    • https://janaravepok.weebly.com/uploads/1/3/4/8/134886337/tutid_bebafikiwa_vikimelejak.pdfIn PDF document text
    • http://vivodomox.22web.org/rodoziregutoxeloz.pdfIn PDF document text
    • http://juwapes.22web.org/florida_ballot_amendments_2020.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/ab7fad5.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_f9c32f63ed5c4df0afd81439493f3f08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/15437289247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d209e42-805b-496d-b50e-a016f4d8d672/44153249444.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/gomisexojanedewizuzinosi.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/89628109208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264f18c6-3b4c-4966-bc9b-782f14759ea9/vujorogogas.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/female_embodiment_and_feminist_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fdb0bc-abe7-4792-b0c7-20c5aff4ea1c/summon_monster_6_3.5.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_154e1d2fe5eb44c7b0acfa30135f8e3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93f5030-1020-4472-95fa-d646f45a0e00/economics_department_rankings_world.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_574ead4f3faf43538b84dfded141eb48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/90329396535.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/abundance_by_peter_diamandis.pdfIn PDF document text
    • http://tibibexubedumu.rf.gd/fasiwisafoloxekel.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 6168 bytes
SHA-256: 9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 5408 bytes
SHA-256: c389ccb2889cb956ff5491d7127ddc643d62436f74c091b6078d5cba4e86b1e8
font_02_sfnt_off00010e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E27 11944 bytes
SHA-256: ee847ab9e7a6bfe79579c4352953dc0965077ef8529382da2dd5de555ffe0468
font_03_sfnt_off0001344f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344F 16460 bytes
SHA-256: 476ab2d8c1d444a517a4f789afed0008b0adaa0a71ba2a8f6807a72f2917dbae