Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0015b7c1b6faad0…

MALICIOUS

PDF

86.6 KB Created: 2021-03-30 23:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2adc1fbe0d75e6aaad0c20d79507082c SHA-1: d85bde0334ee7ca69e22390907c0ab785162338a SHA-256: b0015b7c1b6faad018c81285458d0cda77d5fef6507a1884a9debfc1c8d866e0
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which appear to be part of an SEO link farm designed to redirect users. The primary lure is "heroes charge mod apk unlimited money", suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/wix?keyword=heroes+charge+mod+apk+unlimited+money PDF link annotation
    • http://movizopolu.medianewsonline.com/43261270652.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/5915344086.pdfIn PDF document text
    • https://kepijifawobi.weebly.com/uploads/1/3/5/3/135388201/gisexumebe.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/319818aae80fe82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_8995dc2def944ed1a3ec6851c5312867.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/50282871308.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/autocad_underlay_transparent.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/kenwood_kvt-516_navigation_module.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_4757766f67834c829ca14d0c32a91c35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/zifojumofuteko.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/33934538759.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/ryobi_1800w_2000psi_pressure_washer_price.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_c0e7b4562291428eb67cb0fb27d3378b.pdf?index=trueIn PDF document text
    • http://nodikaduf.onlinewebshop.net/socket_head_cap_screw_dimensions_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/zamumorogesotib.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/somewhere_over_the_rainbow_easy_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/rockford_fosgate_pbr300x4_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/draconian_ritual_book_free.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_8a750dd424694a319d3a7de5b679a558.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/85140736275.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10726 2960 bytes
SHA-256: 00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c
font_01_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 5616 bytes
SHA-256: 6b983c2a99ddf9842f885c1d64c0b2b98d7d63ea417f8129b2aad2d7c1655ce3
font_02_sfnt_off0001248e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248E 11128 bytes
SHA-256: dac07eca42df0adb2c7253358dfed6c79e1b9154e7cac9ed38c6580c7f0c7ceb