Malicious PDF — malware analysis report

Static analysis result for SHA-256 d126bdf7e4475245…

MALICIOUS

PDF

73.0 KB Created: 2021-03-23 01:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fa7c37a5ce2feda6a0677e35f53feba6 SHA-1: 589b7c83c59c6cf7ebb3a720a81ed0b65318bd15 SHA-256: d126bdf7e44752457efdc717e04d14eecd96fa7863bd1a9b8fb9ce1af0e5d55e
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. The presence of external URIs and a link farm suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=mongoose+ledge+2.2+parts PDF link annotation
    • http://roboludawu.mywebcommunity.org/gifagixibivazibigojasi.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/rikaziwopomogi.pdfIn PDF document text
    • http://idealica-italiaofficial.site/growth_mindset_carol_dweckvcvo4.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/sesapusivulunafeko.pdfIn PDF document text
    • http://ketotreno.buzz/fadeguxabevutumopipfabq.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/budidaya_bayam_hijau.pdfIn PDF document text
    • http://filmera.ru/32786847497j0tjl.pdfIn PDF document text
    • http://securityverifiedservices.com/curso_de_ingles_online_de_graaofeuc.pdfIn PDF document text
    • http://stavki-na-sport.site/what_does_the_bible_say_about_the_storm4tz8u.pdfIn PDF document text
    • https://wovuxitijijigot.weebly.com/uploads/1/3/4/5/134524902/b5942220a42c231.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/1618357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_c43c0956be9b4edc91cdbc6999330211.pdf?index=trueIn PDF document text
    • http://xifimerin.onlinewebshop.net/what_is_group_in_organisational_behaviour.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_0f5d8e32a18143ffacfb094e148b135b.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_2c8b0bce05c549b9810418412c231d36.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_bee8f5893c8140a0af04e2afa41d6250.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/980f8106-8a6c-4b5b-9ebe-68cd697e794f/47422278990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532f39d4-2d53-43ef-a6f6-ebd1527829b4/wawemokufofimulegiruj.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_4adae1d7f04a4cbe9edd944f006661b7.pdf?index=trueIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_92063acd93b74eefbaebb48801436eeb.pdf?index=trueIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_3f39ecaabc6f4107ba8c79d3746317c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5a2612-b9be-4db4-9038-9edc0f5d58dd/98975897111.pdfIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/99392115305.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_8521fc493fc2489380d9f302f1c07d73.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_c7568c4fee9445989ccc17ff702e55bf.pdf?index=trueIn 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_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 5296 bytes
SHA-256: 8e750cb68f4b7ba56d88ad1ac57943a7ac909b29fce77526ef071e2a81c9317e
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 11088 bytes
SHA-256: 134052a36f39689de3f08e09a1e3313225dd14138c6d00709a0e43a7f336e260