Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be6959625509b10…

MALICIOUS

PDF

84.2 KB Created: 2021-04-04 21:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60153f3b4ce46e84091e8fba1081e2fe SHA-1: 5b483c2489e2ab78ebc03b4c0be7674eec62ce6b SHA-256: 2be6959625509b10be52289b12460d3c9e85094c13d15fa3e8236fb8411080b3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/aws?utm_term=englander+pellet+stove+repair+near+me PDF link annotation
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/8746154.pdfIn PDF document text
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/wupegaj-lirugalilu-befada-nedigosonude.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/dapinotepimav.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/how_to_learn_self_control_reddit.pdfIn PDF document text
    • https://saxonolofazejel.weebly.com/uploads/1/3/2/6/132681209/pobasa.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/besewigikuleban.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/the_importance_of_being_earnest_film_online_free.pdfIn PDF document text
    • https://lakojelot.weebly.com/uploads/1/3/1/6/131637836/pimonoxokidet.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/kefofusejufanakubafis.pdfIn PDF document text
    • https://reravonox.weebly.com/uploads/1/3/1/8/131856904/9393426.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/63066344065.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/darker_fifty_shades_darker_as_told_by_christian_free_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_6059c6d20ea68.pdfIn PDF document text
    • https://fupefomaxoxaje.weebly.com/uploads/1/3/4/8/134897629/1181728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_6001f2068f89c.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/are_hearing_aid_domes_made_of_latex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_5fdc49da2d939.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/89044490051.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/dakumuxiludaxibab.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/bibelot_dfinition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefowolo.atwebpages.com/16335037327.pdfIn PDF document text
    • http://romakilax.myartsonline.com/jemodukivegofomudawiterix.pdfIn PDF document text
    • http://pilejifizodan.onlinewebshop.net/xezodanutonozipar.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/die_bosniaken_kommen.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_off00010ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 5296 bytes
SHA-256: 0fe270e830ac80d81bf339d8000f674689bb10e37b94bd6914c6e32535515f8c
font_01_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11088 bytes
SHA-256: 8a7e62662e9393e974928fc9135456552c75733e3a313628cded0b4b707ce31d