Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4525ccfeba353a…

MALICIOUS

PDF

88.5 KB Created: 2021-02-25 10:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b130e07faf4c73bd3d26ff6e98651c90 SHA-1: c42f9defe4ca97e97cdadd88bc8a3cbce6ed0476 SHA-256: ba4525ccfeba353ae3ff6b829bd7c06bf7b3cf17679f83552602ca768e1899ff
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF documents. One such link is https://maypoin.ru/wix?keyword=energy+and+life+worksheet+answers, which is embedded within the document's text. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. The presence of embedded URLs and the link farm suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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=energy+and+life+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418367/normal_5fd95d438c002.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/temisajunijurim.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/4458972.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/jjdi0X7/zekom.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/hummingbird_depth_finder_helix_9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_600bc4e73007b.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/how_to_use_a_nextbook_tablet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_600e08e436d69.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/accenture_accounts_interview_questions_and_answers.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/wodiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_60212c03cfd79.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/6jiJSWW/fancy_name_for_bartender.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/calories_in_dunkin_donuts_irish_creme_coffee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/letovopi.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/71393231202.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/63611138705.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/41085865968.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/chitralahari_songs_ringtones_naa_songs.pdfIn PDF document text
    • http://jokosen.atwebpages.com/briefly_summary_the_story_of_odysseus_and_polyphemus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 3092 bytes
SHA-256: a94d9c721c18f5ebae3316d5284e7c8fdf51b6d7e621483f080a711cb889905e
font_01_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 5384 bytes
SHA-256: a37cbf6c7223d56428cc759bf9fb8f7f6b2a6b8f093e0003b56ca611f8e3a90d
font_02_sfnt_off000113c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C7 12572 bytes
SHA-256: 3865672d5159820fc1e94cbdfb5a88753f22be1fe51d6a0d4660485ed9a3c07c
font_03_sfnt_off00013daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAF 16444 bytes
SHA-256: 9625dbbfca8d81e282f3468a83a2363f81b372b2e2d284c316f42437888d67bf

Open this report in the interactive analyzer, or submit your own file for analysis.