Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08226aecd2086c6…

MALICIOUS

PDF

76.7 KB Created: 2021-01-29 16:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8205e52ea7d37ce702874930f9e2eaa8 SHA-1: 9611911a8a3203d30dd0b7e690ee9802bade5440 SHA-256: c08226aecd2086c6407e58b5e6add695994612906f831e056208b6bf5300fedb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=how+to+find+slant+asymptotes+on+ti-84 PDF link annotation
    • https://cdn.sqhk.co/pesegozod/hilgjgh/55639173147.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/yhUXHha/withings_scale_bmi_accuracy.pdfIn PDF document text
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/06f22d.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/fDjcjaY/xotum.pdfIn PDF document text
    • https://nakoginav.weebly.com/uploads/1/3/0/7/130776809/6138804.pdfIn PDF document text
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/jugenu.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/nogojisituwavikebuwo.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/gogilamopulonagoperawaf.pdfIn PDF document text
    • https://mepalowe.weebly.com/uploads/1/3/1/0/131070826/4891546.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/wagovisopow-xazegatifugit-jazon-wovofuvug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nirutavikuda.epizy.com/65416512731.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/3_year_old_practice_worksheets.pdfIn PDF document text
    • http://nixevafuzija.epizy.com/mopimufozanivugawirigavu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/wokarijaxodezerigedux.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/50299478803.pdfIn PDF document text
    • http://momedeturus.epizy.com/most_emotional_whatsapp_status_love_video.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/half_life_calculations_2_worksheet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 5560 bytes
SHA-256: ee485dade2374219303c3bba419c4fb3f917c6a7859cedd00262882e99eccd4e
font_01_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 11540 bytes
SHA-256: 8e7300bfa1c88d893e48fe99ad527dce105ef10772d27a5e358d1dfece78d222

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