Malicious PDF — malware analysis report

Static analysis result for SHA-256 844a7037736be8fd…

MALICIOUS

PDF

75.6 KB Created: 2021-02-18 04:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3ff36d0772b2301218fd105ebd07e8f9 SHA-1: 798cbd89460f73d1e7f23b6ab983b400e4946aea SHA-256: 844a7037736be8fd33440a1570cb4589008dd35cb388df45b392879ee558e2b3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or a method to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the document body's deceptive title suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=horus+heresy+false+gods+audiobook+download PDF link annotation
    • http://nakanilo.club/easy_cubism_art_templateshn77j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fc9a5b4208e6.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/ad96021b.pdfIn PDF document text
    • https://zukafetovozod.weebly.com/uploads/1/3/1/6/131636890/kozazixed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377403/normal_60023f1b211e1.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/povanulezo.pdfIn PDF document text
    • http://businesslinecenter.com/free_latest_bollywood_movies_siteshu8af.pdfIn PDF document text
    • http://bejozenofidon.22web.org/arrows_broadcast_package_free.pdfIn PDF document text
    • http://bugepugatoj.22web.org/borubufozaxarowonefefoker.pdfIn PDF document text
    • http://prizinsta365.online/boxolalivoyu8m3.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/sugosubexez/zinevigobomodi.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/30926684109.pdfIn PDF document text
    • http://xaviwawav.epizy.com/wifi_connect_button_disabled_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/e_flute_cardboard_sheets.pdfIn PDF document text
    • http://rupojizob.epizy.com/space_bubble_shooter_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/rebomigutugilad.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/1659320717.pdfIn PDF document text
    • http://xafonabikox.rf.gd/fizarifemovogafikinedo.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_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 5528 bytes
SHA-256: 1ceb1c658b087adfc4a103e612e4703d107807acfbdc8f3b34acc4c8742154cc
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10396 bytes
SHA-256: a575c258eec40b59861155977996b4d635ea292022aa8198cec7ae34eee15c88

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