Malicious PDF — malware analysis report

Static analysis result for SHA-256 784528329b5a93b6…

MALICIOUS

PDF

87.5 KB Created: 2021-04-07 19:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: deefa7c9664cefa0322dbb51d7042bc1 SHA-1: 4ec2aa29a3bccea42ca250933ccd83294926d609 SHA-256: 784528329b5a93b6277a87e43dbf6de9c89dd387d162dae88237e264588ca6b1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a method to distribute malicious content. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the sheer volume of external links point towards a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://praktika-ingenieur.com/is_procreate_pocket_available_for_androidmthba.pdf In PDF document text
    • http://igcopyrightforhelps.com/jobs_for_restaurant_general_managerecynj.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/kapaxikev.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/fgc7ghr/guide_des_tailles_blouson_schott.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/HZawZgc/rpg_maker_mv_character_sprite_sheet_size.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8EaKX2l/56420072788.pdfIn PDF document text
    • http://erogan-oficial.site/popigimyg9.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/fogilagawo-linifipotaxik-lurowoxan.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/0d982b2d7.pdfIn PDF document text
    • http://allfreebets.ru/56502661957wf6yn.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/4FhaGm9/muvedilimupikuxadobu.pdfIn PDF document text
    • https://cdn.sqhk.co/wafizogep/fTfhdm6/coloring_toddler_games_app.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/getemunelimuno.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/muxewubabasog.pdfIn PDF document text
    • http://coolvdomaion.online/85472627944mek43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=hip%20hop%20charts%20itunesPDF link annotation
    • https://s3.amazonaws.com/gowupuzokowuxes/79439596174.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/zenolukenaligejoritaxexum.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/kerofesuduzon.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/89530637344.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/75684082356.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/british_museum_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/54588932422.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/38520693633.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/automated_logic_thermostat_rs_pro_manual.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_off00011a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4E 4952 bytes
SHA-256: 0545b803a91d4449369a3e5f95228136cda728ad052aea2e364292587a906f06
font_01_sfnt_off00012b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B19 11004 bytes
SHA-256: 9ce5c5420ed2e88d0dadbdaaa171cdcf52c99297ae07900fc97d9e1f8ce392f6

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