Malicious PDF — malware analysis report

Static analysis result for SHA-256 101ffb94546f9670…

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 05:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: afb461cb6962086c7682e6dd105d121b SHA-1: 151588d01176da780b235643d65a0e578cc69503 SHA-256: 101ffb94546f9670af167abd3938b858877cf77512b21de1f5b8ed1216fcbb53
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'maypoin.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference a product review, a common lure for social engineering.

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 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://maypoin.ru/aws?utm_term=rheem+27kw+tankless+water+heater+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5ff1f054e0d88.pdfIn PDF document text
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/rutiguzekoraxu.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/dkYHLhh/70385801754.pdfIn PDF document text
    • http://nesakud.mypressonline.com/81921182504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459164/normal_5fe58bf12c162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460972/normal_5ff7cd35d6d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_602a353015af0.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/aulas_de_violo_para_iniciantes_gratis.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/letter_writing_format_in_english_formal_and_informal.pdfIn PDF document text
    • https://forijadezututeg.weebly.com/uploads/1/3/0/8/130813765/3943215e52.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/7080095.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/jfifhee/final_fantasy_iv_the_after_years_psp_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/bBjcrox/nitudotiw.pdfIn PDF document text
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/3491858.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/4826211.pdfIn PDF document text
    • https://vasoxalevevox.weebly.com/uploads/1/3/4/4/134477515/korep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_605820839246a.pdfIn PDF document text
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/vowudonuwaw_sobegotabefapi_lidigumesovuda_sedik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodisasedozax.myartsonline.com/zuxopugokifobizin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82085cfc-29d1-4980-baf5-1e647d7c6238/black_ted_dekker_graphic_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0327e255-fb22-4df7-a7d3-8b4b7f863a6c/luwifagob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91534ef7-120b-41b8-a1ab-5c18020d072a/73360681882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b793abd-19f7-4183-a631-f0e31b15ee15/xavaxoxil.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/23355302537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b1ef37-ff97-4264-8c72-442ff5d8d2ba/extraordinarias_mujeres_de_la_biblia_gratis.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_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 5360 bytes
SHA-256: 823beda9de8712ef82d3a66fcee5004941448f981ca9c4629bb0b4825d548acc
font_01_sfnt_off0001195e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195E 10940 bytes
SHA-256: a3cdc65a2ae557671ecf6935cbd63afe8df04c95e57e1ea6e762c2a3cb7d7d2a