Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a3e3fbc5a2e78b…

MALICIOUS

PDF

84.0 KB Created: 2021-03-17 22:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5df3596489e1bb947f12cf6c51052307 SHA-1: c1fdd5524479304ddb1f2287362afd684eab3512 SHA-256: 32a3e3fbc5a2e78b2aa7883472b1af5b8c723d897acf8d5fdd81c4f9d3272c1c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=new+moon+meaning+january+2021 PDF link annotation
    • https://cdn.sqhk.co/reposivekow/hahfxUR/sikokasomakoditeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5fe7067270ebd.pdfIn PDF document text
    • http://koreanluxe.com/lezalilefisesupupemupuc445m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fd6805ded74b.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/7cc90e49b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405650/normal_603f7fc8c7453.pdfIn PDF document text
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/velepuvezeferot.pdfIn PDF document text
    • http://idealslimitaly-official.site/81824027885ds1co.pdfIn PDF document text
    • http://lienforkid.com/tata_sky_packs_2019_list68kve.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/ifQjegg/vida_saludable_frases_cortas.pdfIn PDF document text
    • https://cdn.sqhk.co/tovitaxani/ghhdjfR/background_hd_images_mobile.pdfIn PDF document text
    • http://datingdate.site/34327578613idxau.pdfIn PDF document text
    • https://nulivuxod.weebly.com/uploads/1/3/0/7/130776854/8436002.pdfIn PDF document text
    • https://dozetiwe.weebly.com/uploads/1/3/1/8/131856451/5387920.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/988ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_cca562de77dc42af88b487e3f0f81b15.pdf?index=trueIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_2764894d77344316ad1fd41dd997d361.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_881b1d76941a4b02ae7cbf7b9dfeb450.pdf?index=trueIn PDF document text
    • https://2ed9768e-82a7-41f7-bc91-4b86d8d7aa0f.filesusr.com/ugd/bdbd91_1355231f50c241e3b581fe615556e50b.pdf?index=trueIn PDF document text
    • https://20097937-9b7a-4da4-851c-33e9a8906939.filesusr.com/ugd/1e3518_346324f8563b4b329b9f6523227d03a3.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_609a35c8712e4df3accaa8c700857f0f.pdf?index=trueIn PDF document text
    • https://5563968e-3cf5-463b-8312-7915ab8a4794.filesusr.com/ugd/cd90d1_8929164f55c143d19b46437b22f2c68a.pdf?index=trueIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_63189171644c4187aa06270f0a4db482.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C2 5360 bytes
SHA-256: a7f4b4f695e8689a20f1e88f3e226b72331b3a702e9b45ea38e4c773a73acf20
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 11308 bytes
SHA-256: eb6a42e77abfebc88e895950dc9c0209ceaf0f3807bb73a84d4adb0a79f5a80e
font_02_sfnt_off00012cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD8 16224 bytes
SHA-256: 9075f82eca983399cd796a0d973342fb68a133950e51a66b56e85bdc3d341901

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