Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c483494a674e4f3…

MALICIOUS

PDF

82.4 KB Created: 2021-03-24 14:25:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fdf67ec8b68e491726a6099f042cd1ac SHA-1: 3f0b96ad2ed76c493ed0ebd305f3d0b01ccffecd SHA-256: 1c483494a674e4f33db8b3aa17781c2e9696b0eeebc6125d44fe57dc6d42edab
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=subway+surfers+game+apk+free+download+for+jio+phone PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/lgfjh3S/cat_runner_decorate_home_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wiradimabid/jghegix/wikevitumulilevi.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/jyjcjb6/xinujaxe.pdfIn PDF document text
    • https://foreguguwikib.weebly.com/uploads/1/3/0/7/130775698/torow_belodazorubu_kedajuk_gojaxemaxumelo.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/dAgjgj2/najewozur.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/4489f81f219.pdfIn PDF document text
    • https://cdn.sqhk.co/kanonilabepi/0dk9Ife/club_factory_online_shopping_app_download.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/nivukijoduzuki.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/die7jd2/spiral_christmas_tree_pathway_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/naxaroja/Yl5hbjf/pbs_kids_games_kart_kingdom.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/21838691102.pdfIn PDF document text
    • https://xegugunozom.weebly.com/uploads/1/3/1/4/131482992/0015236c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/adobe_captivate_9.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_3b706872831f4a4cb73aecd8e337d594.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokelur/wujalasixa.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_6701ae7f4af848efb672698074376f94.pdf?index=trueIn PDF document text
    • http://xowobovu.myartsonline.com/kakiju.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/zezewexo.pdfIn PDF document text
    • http://nitubak.atwebpages.com/new_acls_guidelines_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/nisaladorawaru.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/89235804116.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_off0000f4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DE 6032 bytes
SHA-256: 531c2b921712a450b405a9350ecbb07d30c7ad5fe50782b77c0309e854c08cdd
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 11360 bytes
SHA-256: 71999583765abb8e51e94882022fe2371b19560c1788b5aed8982113f17befb6
font_02_sfnt_off0001303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 2884 bytes
SHA-256: 974b8b8a6cbac5f2ad2efa081e6f5d68ca6c2ff63dabf767646c382b10e70ce0

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