Malicious PDF — malware analysis report

Static analysis result for SHA-256 11178a8184b3331b…

MALICIOUS

PDF

149.1 KB Created: 2021-03-27 20:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 670a2a4ed1feddf396ad26dca1afe939 SHA-1: e8f37f643bdca1f83dac5cc06866de701950e35b SHA-256: 11178a8184b3331ba877809fa98b9c7b4fbdc8d50f671a72d9a4b4e1570704a5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure strongly suggest this document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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 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=segunda+mitad+del+siglo+xix+en+colombia PDF link annotation
    • https://cdn.sqhk.co/patagarinixa/jfrW0Jr/amazon_delivery_driver_uniform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_6025267d5961c.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/RuEMzhc/juventus_fc_news_twitter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5ff8d6e26acca.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/1Khaji9/vojufekafaseriv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_6015e11ece96e.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/dhjhi72/negan_the_walking_dead_iphone_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_604ec556aa2b6.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/hcjcGvh/inflatable_balloon_dog_costumes_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/edsghsA/20197334480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_602541fc28ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/FzBihtS/37276057269.pdfIn PDF document text
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/113697a9.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/rijiwuse-bixirufobunaliv-xelagaram-woxodavikuje.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/zuzab-gopel-furatejoduzu-tenabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_602a97b8baabc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd144bc122b4.pdfIn PDF document text
    • https://kofitabalu.weebly.com/uploads/1/3/0/7/130775223/2a1d681cc7c30.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/mjbIWjb/spam_call_blocker_iphone_free.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/659367b4-450c-44e6-85a5-9bf330a61562/zixutekokenurereruzofegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16289fff-a903-4d31-89a9-e5873ef553b1/what_are_the_stages_of_the_heros_journey.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_off00020844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20844 5472 bytes
SHA-256: 9e73aa1b8580704128ef49f0a9118b8cbcab74f115c8414269d592b5221b26f8
font_01_sfnt_off00021ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21AD4 13052 bytes
SHA-256: a70ea5c4bf6e4ca0eb5be6bdcd1cfabad2e5961646945da817f902a62b3f4d53

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