Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a80ca5c6fd7615…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 22:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a8cd5b354cab3b16f3caeb7363f6c798 SHA-1: 7945a65233984ac3af13e66dd86d2f3753f6cee3 SHA-256: 50a80ca5c6fd761526f910768a251fd546561ebfae48b4663057771b7620951c
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous external URLs, including one pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving the redirection of users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=how+to+sync+sony+subwoofer+to+soundbar PDF link annotation
    • https://cdn.sqhk.co/rifojimuna/ihhjWqC/50797557459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5fe0387085197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_603854f09edf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421050/normal_5fc9aba55b895.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/5igjiun/superhero_mod_apk_version_2._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_5fda3fb7315f5.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/wezedegokuwefox.pdfIn PDF document text
    • http://zefefiwova.medianewsonline.com/romesedi.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/cV2gg3l/ding_dong_the_witch_is_dead.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pawepeg.atwebpages.com/dt830b_digital_multimeter_circuit_diagram.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/81001087909.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_11ff6f08a7b3419493c1bbffef945f4e.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_9035abe6105d4ceba38ef4df9bf9184c.pdf?index=trueIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/aviation_week_and_space_technology_magazine.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/beauty_by_jane_martin_quotes.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_88b4b14a516b40d7b31aa9868360620f.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_d69c9e56c0254a7abb2755ad7f84e8eb.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_b4791351bf344dc58d21c7f0ee4310a0.pdf?index=trueIn PDF document text
    • https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_dd3979f10a2d43a5aef20f02b76496d7.pdf?index=trueIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_b33e0eae136240a4b25151f1227a58dd.pdf?index=trueIn 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_off00010bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEA 5276 bytes
SHA-256: 92bd4d7b722efc62d9ced08ae5bf7d7bcbf31b94440a9c83dcac60eb58465231
font_01_sfnt_off00011dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFF 11188 bytes
SHA-256: 6db89750f49a8d8e04528954a72ca611426b2d91a0fad879d2a270f0b1aaea8f