Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76722d56519ebd1…

MALICIOUS

PDF

75.2 KB Created: 2021-03-19 11:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d030a69d5841dd885c9920e2a740cdb7 SHA-1: 8ce56657804842e2b9024cb0b763d1ff378e22e9 SHA-256: c76722d56519ebd1c8f152bb8df3aba311cc784ea7ee57d47abfb02c8fb6718d
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=c+printf+boolean+format PDF link annotation
    • http://tophomework.space/aioat_2020_bookgxfwe.pdfIn PDF document text
    • http://espaceabonnes.com/225092990580oe6n.pdfIn PDF document text
    • http://muluwusive.22web.org/beyonce_crazy_in_love_mp4_free.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/76966653323.pdfIn PDF document text
    • http://familyit.info/tirorowewurogamewemvyec4.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/boxaxifedun_leguzaxepow_fukenar.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/behind_the_neck_press_formtf043.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/palimuwerofaseripiw.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/9d1e5e2.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/71989064620.pdfIn PDF document text
    • http://indital.space/pokikisanusilu7byy7.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/gutidapadefiwof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a4f78d-4cfa-465f-99bd-088991b7100a/fifty_shades_of_grey_full_movie_download_hindi_dubbed_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b723a441-ad36-4d9d-9dcf-6891b022d830/alphabet_flashcards_for_toddlers_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9088a21-c5de-474d-bcbe-dbdb542d242c/51379193292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ecef5b-ebf4-4adb-a832-8fd2ee0f3ee0/68910338532.pdfIn PDF document text
    • http://muxobuduxude.epizy.com/how_many_sex_offenders_live_in_california.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/28326843841.pdfIn PDF document text
    • http://juvelanasamezu.epizy.com/18245994116.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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 4916 bytes
SHA-256: 69b36b8550465623bd595ae8054e679cea55e58eb7677dd9bbd787e836123e42
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 11556 bytes
SHA-256: b733a5658abfb68c970b82f0a21f5e69444b69c2b89967e2a0dca153081705ec

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