Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2d42340b2de6a7…

MALICIOUS

PDF

82.2 KB Created: 2021-06-08 22:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 648bb5f564213bb26905d9717f958a4b SHA-1: 1a21130c6f985bbd15f9c7f334c1f9c32ef5a697 SHA-256: bb2d42340b2de6a7965f24c07a193fb15e44ef4a3cb096179b994f4380077545
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 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://allytemp.ru/pbw?utm_term=fast+and+furious+9+trailer+tamil PDF link annotation
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/nemugugofupegarut.pdfIn PDF document text
    • https://xodajozazav.weebly.com/uploads/1/3/5/3/135305433/sajamugugobavij.pdfIn PDF document text
    • https://fobimagav.weebly.com/uploads/1/3/4/2/134235660/1938810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_6046463976bf5.pdfIn PDF document text
    • https://romesezex.weebly.com/uploads/1/3/4/6/134605020/rupuxiboxeduloset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_603fb8bc9b838.pdfIn PDF document text
    • https://bobujiwa.weebly.com/uploads/1/3/1/0/131070874/e3fc3c3.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/407ebbb29f.pdfIn PDF document text
    • https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/modoronixiv_jusevelup_fitimalanamagu.pdfIn PDF document text
    • https://pusakinadolelu.weebly.com/uploads/1/3/2/6/132682110/8246871.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465403/normal_60b6e939aaf4e.pdfIn PDF document text
    • https://wexikapej.weebly.com/uploads/1/3/0/8/130874413/giwixonu.pdfIn PDF document text
    • https://jukusixod.weebly.com/uploads/1/3/1/4/131483076/gegexiwunujig_bimojuzifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debitagemi.pbworks.com/f/how_much_does_the_average_swing_trader_make.pdfIn PDF document text
    • http://xivoxibuza.pbworks.com/w/file/fetch/144786516/90346409364.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144476364/is_manual_or_machine_blood_pressure_more_accurate.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/w/file/fetch/144445314/can_i_install_google_docs_on_my_pc.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144679704/56867749553.pdfIn PDF document text
    • http://kekirow.pbworks.com/w/file/fetch/144810918/farmville_2_ky_kaama_mod_apk_son_srm.pdfIn PDF document text
    • http://magogopowo.pbworks.com/f/ruvasibaxorevevesifaze.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_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 5164 bytes
SHA-256: 000e7be39d60eb60d2aa67c1b1547294b9df4555622099edc571e237a8960b9b
font_01_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 12720 bytes
SHA-256: a183bb4b8c6196092027cde18db81498b3827f211ea45d4bd2944c1e7d0ef846