Malicious PDF — malware analysis report

Static analysis result for SHA-256 11849d7338488c89…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 02:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05a9ea87cf3c92af22eac51bcf09e700 SHA-1: 60629a9591eda750df150560eaf07d0df5a01d32 SHA-256: 11849d7338488c897fdc0d584256a686cc6e14666e132e0bfa5dd0f2dde32dfb
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'Black and Decker 16 cup rice cooker instructions', likely intended to trick users into clicking malicious links.

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://vilenefex.ru/wb?keyword=black%20and%20decker%2016%20cup%20rice%20cooker%20instructions PDF link annotation
    • https://cdn.sqhk.co/kawabewiwof/iCjghaj/jemudinuduma.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/Jhihfjj/samsung_family_hub_french_door_refrigerator.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/HHibdhj/43011654405.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/geboge-kasebexavivi-sopezula.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/aihbLhd/kogariwamalumefezulorafar.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/2052956.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/iagfhfN/cardinal_quest_2_tower_built_in.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/jfgcMiW/11145310971.pdfIn PDF document text
    • http://dedaruk.scienceontheweb.net/sample_antenuptial_contract_with_accrual.pdfIn PDF document text
    • https://cdn.sqhk.co/buwaxaxodi/VF9hgpx/sniper_gang_apparel_slides.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/antibiotics_essentials_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifiwaw.rf.gd/binomial_expansion_worksheet.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/gapurinopuwat.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_a83ef14f1e1643669422a6ac6abd6c34.pdf?index=trueIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_cf2226512fe34d26a1e2a913b4bd5305.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_93289995606341e6af90c3b2f44fe8d3.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_48d92a8333cd4bf580d43ba574b409e2.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_599fa2a7df474de0866c0183bc94553a.pdf?index=trueIn PDF document text
    • http://linawewadonan.rf.gd/what_is_the_best_robot_vacuum_2020.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_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 5388 bytes
SHA-256: 662bd146434fcab81915278736a171b19e679e4af60b66025e85b0409b2a178f
font_01_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10364 bytes
SHA-256: 6971a1b4fbdb312e75f6f7537c8f43431a3c6f0f472b6d43b514b7dd83e95bbe

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