Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9a30cea168f563…

MALICIOUS

PDF

80.6 KB Created: 2021-03-27 18:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: fdbdb90eb112b6c71dfad603f657e75a SHA-1: f331bc278bfd2e5066558a68051e15fb22d16075 SHA-256: 0c9a30cea168f563f3c9bddf61e2063f99b3eee7c2d2ef72de4e07dc9eedd291
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and potentially malicious PDFs, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with SEO spam or phishing campaigns.

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.
  • 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://nipisod.ru/wix?keyword=similar+triangles+worksheet+with+answers+pdf PDF link annotation
    • http://whitetwo.space/rerududojamidiwituromazuyf1yd.pdfIn PDF document text
    • https://lojizeli.weebly.com/uploads/1/3/3/9/133997115/palogibixezopiv-kotebizepebowu.pdfIn PDF document text
    • http://dressnbuy.com/51052997u6oad.pdfIn PDF document text
    • http://maska-respirator.com/miginukutusurivilbdqr6.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/befebuxora.pdfIn PDF document text
    • https://gidixolatuloxag.weebly.com/uploads/1/3/1/0/131071157/texixakunukofilede.pdfIn PDF document text
    • http://technodom11.com/28582399303db8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_29ce2472e6004b4990b611f6c3541824.pdf?index=trueIn PDF document text
    • https://a5f97fb6-6895-4a42-8c51-2de4018fe37d.filesusr.com/ugd/1eae48_ccf7f95e5cb74226bb5fd452c3bb59ef.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_2892be23f204447aace80cb8868c2964.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc0cb5f-13e6-46f2-8719-8f7c1f96669e/budezurumawixer.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_82d15efa1e004611923147e54210ad8f.pdf?index=trueIn PDF document text
    • http://zogosugo.onlinewebshop.net/how_to_probability_distribution_calculate.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_5d7bec15b29541049138f05f935d52ce.pdf?index=trueIn PDF document text
    • http://gipebevu.atwebpages.com/aqa_science_gcse_biology_textbook.pdfIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_4cae1d9055784565bfdd16bc5719e342.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7faf81a9-2560-495f-b854-cd4f42b1d203/volunteer_training_drills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052ba37e-495a-4349-aff4-19b9e6359359/bejizakugubipinom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10161fa1-8bdc-48cf-9a4b-6245d35f633c/toro_850_super_blower_vac_manual.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_f75243528da64349aa833a9355333a68.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 5716 bytes
SHA-256: cf6c454c4ada20645b1cc2028a216bd6a3bd11ec525fb804b992570b712fe75c
font_01_sfnt_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 11200 bytes
SHA-256: 6c873880bc0cb207d0de5b7516f63b76e0c0349bac6b631b990b92102e503633
font_02_sfnt_off00011ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 16072 bytes
SHA-256: f3b752e25d2e3098dc5b351a512c5ca672d2b137fcb7ddb3f81b2384be51d5c3

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