Malicious PDF — malware analysis report

Static analysis result for SHA-256 5822433179871cfb…

MALICIOUS

PDF

144.2 KB Created: 2021-06-05 04:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8e1af08c1ecddbd1919fd4e18583f11 SHA-1: aab9093321b4d2e7ca4828a898d94d3c515b83c5 SHA-256: 5822433179871cfb8ac3aaa6acfe8de76cdebd322cbd4e1f14347049ef1f65b3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic. The presence of a URL with 'vocal remover pro apk crack' indicates a lure for potentially pirated software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/123?utm_term=vocal+remover+pro+apk+crack PDF link annotation
    • https://funexidep.weebly.com/uploads/1/3/7/5/137520049/gazemaxid-luxisipite-zebowewujofoz-senomavoral.pdfIn PDF document text
    • https://sejoxamopizava.weebly.com/uploads/1/3/1/8/131858661/4390730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_604a4b926a084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_60224df80b2dc.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/tanotopogaxit-somaji-wafuvo-vifotuvajip.pdfIn PDF document text
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/xifupubede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_5fdb7b84da2d2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4501380/normal_60b071c3f2939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/365577e1-9981-4fe9-9588-d61fd6e0d970/90442997234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fc96ed-f7d5-4dd2-9058-dde325b1febc/81040873790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edd7708-443a-40d1-a213-c55cb15be2d0/nemowadetimubatemana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af64990-208f-4102-a4ec-f4da9d96b575/48833202148.pdfIn PDF document text
    • http://likanegi.pbworks.com/w/file/fetch/144513153/18529909142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fdb200-5de6-4483-a350-83c63ed93d86/vokimaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c707efef-86c5-4a34-b218-6aab03433a45/vifugiguref.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/w/file/fetch/144635931/dejiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb51e71-e27d-4847-8cfe-517b9822dd8d/15575876998.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/pakevolaratijoduvikuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b77f1f0-355e-4c63-aadb-9463250f0497/47963704205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8164af64-ae84-428c-9750-13c116e4537e/renzetti_apprentice_fly_tying_vise_review.pdfIn PDF document text
    • http://gopidam.pbworks.com/w/file/fetch/144592062/mezosorupanemulipibugazaf.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A49B 16776 bytes
SHA-256: 3bd3bffb27f77750a9ed5a21c9f9a5ecb7449db40f89ca7c343df4e3ed750123
font_01_sfnt_off0001db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB64 4544 bytes
SHA-256: 7e0c95456d6d4a685905e8b566336a1309d1fa6e9c14b47d64a6f80f4909e3d0
font_02_sfnt_off0001eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAC0 4864 bytes
SHA-256: a2d9398913be3b83e9b59643e876f516db2e8c1a5b3e623abbb6aba517fd01b1
font_03_sfnt_off0001fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC0B 11760 bytes
SHA-256: 1300074ab2be2c5fbe00f02e969832c37f199ff5d86cc6430206f6950108c917
font_04_sfnt_off000223ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223BA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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