Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b5a142ecd99ee2…

MALICIOUS

PDF

74.5 KB Created: 2021-03-13 19:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 34db8ad057037891bd5a585696c76d91 SHA-1: cc6a821d70b9880e9dc4d99380541660db6fe6ef SHA-256: 76b5a142ecd99ee2441b1ddfdc05ef1c0f80cd25d077e0f337464a06b6932b9d
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 0.9997

Heuristics 6

  • 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 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://xajibur.ru/wix?keyword=ucc+lien+search+california PDF link annotation
    • https://vasaradafivoza.weebly.com/uploads/1/3/6/0/136048391/vujibixot-potuxawonide-kiwebog.pdfIn PDF document text
    • http://tudiweva.22web.org/15174596118.pdfIn PDF document text
    • http://gewututikame.getenjoyment.net/tcp_ip_guide_table_of_contents.pdfIn PDF document text
    • http://vvd.bar/32866162278r4e1q.pdfIn PDF document text
    • http://businessoutsourcing.org/jilolifiramaneponalewevel8t81.pdfIn PDF document text
    • https://bebadivinokad.weebly.com/uploads/1/3/4/6/134604253/felekovewaxexajoma.pdfIn PDF document text
    • http://gunonoxuketevel.22web.org/best_synonyms_and_antonyms.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/65505931523.pdfIn PDF document text
    • http://tramlaweq.online/affairs_cloud_current_affairs_august_20195823g.pdfIn PDF document text
    • https://zedijonen.weebly.com/uploads/1/3/4/0/134018258/6d08d9.pdfIn PDF document text
    • http://canlisohbetim.net/tosisuwogotolakigkhshl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_8669b321cfe24d1289fbc67b8db9daad.pdf?index=trueIn PDF document text
    • http://wevovodoneto.epizy.com/virazagosuronoga.pdfIn PDF document text
    • https://691dfa98-c543-4342-b77d-a3d7fbf094aa.filesusr.com/ugd/d55835_3d8231b2daee4fb1b94b7e6bd8770037.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/25113593761.pdfIn PDF document text
    • http://lerobuzal.epizy.com/posutevitamudopavim.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_d14401a1a8204360ba93a4b01de7cb58.pdf?index=trueIn PDF document text
    • http://ruwiluleter.epizy.com/non_coliform_organisms.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/bitdefender_internet_security_2019_deutsch.pdfIn PDF document text
    • http://zoponoz.epizy.com/85633892450.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 4960 bytes
SHA-256: 52851be38d2ff277e6b735ab6e8fccbc3459cb0d360b9f3ead4f50a7f500373d
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 11504 bytes
SHA-256: afd7e3d400bf3371bd4bb1bcbbe1fba722f483d7199172239e38ecf2946514e9

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