Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed80c2e7e32ce837…

MALICIOUS

PDF

72.4 KB Created: 2021-02-24 22:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7fe5808e686e37c5de2bb785f40a42b SHA-1: b1e97a12adc25620e2b971868cf73a4d95761b39 SHA-256: ed80c2e7e32ce8377ef6488f6ea2cf27086f2f0445d42b81e9056efa70bdb99a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to a song title and authoring application details, which are likely decoys to mask the true malicious nature of the file.

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://jottigo.ru/strik?utm_term=go+tell+it+on+the+mountain+song PDF link annotation
    • https://cdn.sqhk.co/masamiwe/7jhYT0K/smashburger_recipe_pioneer_woman.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/gdiaHif/3462198701.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/3jhijWl/verem.pdfIn PDF document text
    • http://iminn.ru/12824039240j8159.pdfIn PDF document text
    • https://cdn.sqhk.co/rufomezin/jghiihf/11159187991.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/C6UJhbd/90890474628.pdfIn PDF document text
    • http://boost-store.net/534721611010e65a.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/Z6JhEmL/22233621422.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/didgKe0/40687546313.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/33351872578.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/esg9jgU/disufeludefata.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/acd051.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/ihhIhg3/80009726444.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/37577653077.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/igOeicR/download_fruit_blast_knife_master_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/cgoVgcw/the_ramen_sensei_2_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/88901347305.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/soleus_air_70_pint_dehumidifier_not_working.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_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 5036 bytes
SHA-256: 54b5d668f4bdda4092830deccab357f96fb28975e0c7ade49bccd1259e3c3bc6
font_01_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 10992 bytes
SHA-256: a60df4ddf1a1674538c5ba252ac9621220faa707dc7bd86ac4266d068095f78d

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