Malicious PDF — malware analysis report

Static analysis result for SHA-256 18864bc904bc990d…

MALICIOUS

PDF

71.8 KB Created: 2021-02-21 04:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4c7343ed93f83f89821458f6fb37ccf5 SHA-1: a81227e782638b49e3e714e6273f8c1ad9c881ec SHA-256: 18864bc904bc990d41e3e4efcf856eddc13a5d7a250a6f66e99c54fca1e93aaa
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, mentions 'Clash of Clans army guide', which is likely a lure to attract users. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a high ML score and ClamAV detection, strongly indicates malicious intent. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

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://maypoin.ru/wix?keyword=clash+of+clans+army+guide PDF link annotation
    • http://alluniversity.fun/buwemunidilutipovazupapagd50.pdfIn PDF document text
    • http://xozonline.ru/angular_6_formgroup_submitnvxqs.pdfIn PDF document text
    • http://wegansit.space/unique_happy_new_year_2020_gif2i8h3.pdfIn PDF document text
    • http://abreudesigns.com/73546294786o0tpy.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/2e789.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/wemotonelufigeketuta.pdfIn PDF document text
    • https://finazevad.weebly.com/uploads/1/3/0/7/130739247/98fd5db94348.pdfIn PDF document text
    • http://5gusevshop.space/pifedogawijivedna7il.pdfIn PDF document text
    • http://topcreditcheck.info/dresden_files_books_age_ratingqy89n.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/48036.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/7462450.pdfIn PDF document text
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/bumikoxazososat.pdfIn PDF document text
    • http://likelid.xyz/abaqus_topology_optimizationg4w83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://virixufagew.rf.gd/84678232952.pdfIn PDF document text
    • http://tofozoriwo.rf.gd/what_is_the_meaning_of_interpersonal_skills.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/61243834916.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/ryobi_10_inch_portable_table_saw_parts.pdfIn PDF document text
    • http://pobediwawe.epizy.com/bad_behaviour_worksheets.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5444 bytes
SHA-256: b51f03939314ee225a31f99c45b5f0cffd52894ebd5d60735cfeeb08f8fd6c36
font_01_sfnt_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 10276 bytes
SHA-256: 97c1bfe1550c523871bae1dd0c0408d3dfc3a1f42abf31f3d6a590d5cb93b548

Open this report in the interactive analyzer, or submit your own file for analysis.