Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b74af55f1e855d6…

MALICIOUS

PDF

80.1 KB Created: 2021-05-22 23:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 09eb83fc10de4e69636851115b6ca1c5 SHA-1: d1490aa1482fd11632db5cbc84088ec977c984df SHA-256: 8b74af55f1e855d677955d4f287ead3be97c09480767074bc2c87e1cab04f11b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to a 'uniforme da juventus 2020', which may be a lure to attract clicks. No scripts were extracted, but the presence of numerous external URLs indicates a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=uniforme+da+juventus+2020+para+dream+league+soccer+2019 PDF link annotation
    • https://fidinavaxevipew.weebly.com/uploads/1/3/4/8/134876378/bibapow-genawi-xonipedinar.pdfIn PDF document text
    • https://jividakole.weebly.com/uploads/1/3/6/0/136090299/kejadegir.pdfIn PDF document text
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/wujerobamoduv-ragupewepun.pdfIn PDF document text
    • https://gofutetawavoror.weebly.com/uploads/1/3/0/8/130874623/gosadesalumomi.pdfIn PDF document text
    • https://foreguguwikib.weebly.com/uploads/1/3/0/7/130775698/zolujen.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/ganufuvak.pdfIn PDF document text
    • https://doxipawuno.weebly.com/uploads/1/3/2/6/132682924/7488794.pdfIn PDF document text
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/fezakapokuje.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/a02eee63b2.pdfIn PDF document text
    • https://lodufifed.weebly.com/uploads/1/3/1/4/131411197/xedoke_widago.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/7945166.pdfIn PDF document text
    • https://mozubuwuvufizo.weebly.com/uploads/1/3/4/6/134600540/vanumirega-jijemamirisul-dexajisolebawip.pdfIn PDF document text
    • https://lakizixobatit.weebly.com/uploads/1/3/4/3/134325667/6778663.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/dafajapileve_zusedatisiw.pdfIn PDF document text
    • https://luzoxunijasuw.weebly.com/uploads/1/3/4/3/134338954/zusejadatu.pdfIn PDF document text
    • https://ligefunodimab.weebly.com/uploads/1/3/1/3/131398292/9153123.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/8b15b705f5.pdfIn PDF document text
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/tavusogogesomovewise.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/d975170c56ab1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/waxanurabutipugeju.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/madwoman_in_the_attic_cite.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/77663153498.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/kovufopabopirob.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_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 6084 bytes
SHA-256: 94b347dd5ea42f27f080133f9b08368dbd117a1133b767a53f86a2e2c7d6157a
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 12316 bytes
SHA-256: 66041849e47731a71a877c664a9d56c451232144e7b7e90b1fa2c6e8971adcc4