Malicious PDF — malware analysis report

Static analysis result for SHA-256 4200534816d17a61…

MALICIOUS

PDF

76.9 KB Created: 2021-02-18 17:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 06dc1e9c9a3507255514fc4eda604dcf SHA-1: 10191aeb78144987f05eea5b05d97173cb07d188 SHA-256: 4200534816d17a615ece130b624acc2bd0331123741cf0d8470829ac9a1ca5cc
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, indicative of a link farm, with the primary suspicious URL being https://maypoin.ru/wix. The document body is heavily obfuscated and contains no readable text, suggesting its primary purpose is to host these malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://maypoin.ru/wix?keyword=mini+baseball+bat+dimensions PDF link annotation
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/mozula.pdfIn PDF document text
    • https://tisuzozolida.weebly.com/uploads/1/3/6/0/136087901/sipowikavovi.pdfIn PDF document text
    • https://redojakora.weebly.com/uploads/1/3/2/6/132682723/sasujijireka-lefiwejorat.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/6093489.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/newonugod-bobipegonezog-budedijena-xilosoxus.pdfIn PDF document text
    • https://pipefedib.weebly.com/uploads/1/3/1/3/131383483/5695584.pdfIn PDF document text
    • https://kosazalosir.weebly.com/uploads/1/3/2/8/132815054/cd1b95.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/7740097.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/pifaladomoda.pdfIn PDF document text
    • https://zoxobafibo.weebly.com/uploads/1/3/4/2/134235835/bamivaju.pdfIn PDF document text
    • https://molowusutet.weebly.com/uploads/1/3/1/3/131380828/c338caf.pdfIn PDF document text
    • http://bapipakaroxi.22web.org/jewish_new_year_card_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/girilifawuxi/jibigowejubexafisudebo.pdfIn PDF document text
    • http://robinovedibepo.epizy.com/bowmasters_all_characters_unlocked.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/mcgraw_hill_biology_textbook_9th_grade.pdfIn PDF document text
    • http://milibelibagusez.epizy.com/zapeki.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/hi_ho_silver_lining_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/pdf_gametogenesis_pada_manusia.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/lotesaxilatixutiganogid.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/muxunotud.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/51830337379.pdfIn PDF document text
    • http://vijamutekaga.rf.gd/wewula.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/aloe_vera_plant_information_in_kannada_wikipedia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 4808 bytes
SHA-256: 4043187c891d74b0e83647d4d6d6b0dec816c76847557a4eab5dacfc7c2249a7
font_01_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 11776 bytes
SHA-256: ec06ffb9a11f9df6a430987ad2e686fa41ea5fde030b1951e7135f4ba34e489f
font_02_sfnt_off0001181d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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