Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ab8985247a0bbd…

MALICIOUS

PDF

78.0 KB Created: 2021-03-13 17:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2431a906551df45e8b6f4c9ba1324be2 SHA-1: 202e5aabf867438cb3fbda7f9d4893328cfc5800 SHA-256: 83ab8985247a0bbdeafa1f4c6d6ad480726573015fb10ad0fbdf7c6a12aea479
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://leonvi.ru/strik?utm_term=washington+football+team+final+roster+2020 PDF link annotation
    • http://nesobaka3.xyz/world_empire_2027_apk_hile63y4g.pdfIn PDF document text
    • http://idealicacolumbia.site/seating_arrangement_in_classroom1jl9i.pdfIn PDF document text
    • http://triple-doska1.club/tabiponipiotqz8.pdfIn PDF document text
    • http://ooovseanalizi.ru/jonolataxolajuzawoburohlv.pdfIn PDF document text
    • https://jiwalevimube.weebly.com/uploads/1/3/4/8/134870165/1310343.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/werutazifowexe.pdfIn PDF document text
    • https://nidarefazumeb.weebly.com/uploads/1/3/4/7/134748986/zimer.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/kelivuludede_gubemut.pdfIn PDF document text
    • http://avit0.cc/51841333836acvop.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/why_is_my_directv_box_blinking_red.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/c1bd4d24-8e2c-40e3-b73b-37c1147e5f32/64833724280.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_3f8566c699c0428ba8c6b2655b91bcb1.pdf?index=trueIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_a4d7c1ed59b74170ac8ed990057ac877.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_2b6e0643b5f9453daf650d3f1106023a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72016507-be34-48e5-b298-cf0b26fc4d21/methodical_deception_reviews.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_05c4de2631234baa86f5d60d1b5c20de.pdf?index=trueIn PDF document text
    • http://wumafopid.onlinewebshop.net/vtech_digital_answering_system_dect_6.0_manual.pdfIn PDF document text
    • http://jokosen.atwebpages.com/can_you_pair_ue_boom_2_and_wonderboom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7586bfe-e5c2-4a10-a538-0311b300153d/kidde_smoke_alarm_battery_size.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5608 bytes
SHA-256: daadecfb373b266f3ad9c5c7b0f78383308bbc87ddbf816c3ce0fd456a98e94e
font_01_sfnt_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 11176 bytes
SHA-256: 5f5f8e6e1be5f3e2778a682e52683ae9318906266fc65b2a74a26bc77c9f35f7

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