Malicious PDF — malware analysis report

Static analysis result for SHA-256 076c82b482b85bdf…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 02:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0659c3e8560d16c3420741f0f2adb6e9 SHA-1: 0d17006564268613874411416dd5746ef9a1dc2d SHA-256: 076c82b482b85bdf33d14e853625b63457b54a7eaf616332c7167907ca918ab9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the PDF structure point towards an attempt to manipulate search engine results or lure users through deceptive content.

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://jumiwimov.ru/wix?keyword=falling+leaves+adeline+yen+mah+pdf PDF link annotation
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/penijojug_ratatutexasasub.pdfIn PDF document text
    • https://zokupirijega.weebly.com/uploads/1/3/4/0/134000213/9297262.pdfIn PDF document text
    • https://zupeloniz.weebly.com/uploads/1/3/4/0/134018773/puletipunixepo.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/43495986917sh1n2.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/jheiehc/57103291436.pdfIn PDF document text
    • https://cdn.sqhk.co/gebijowokobe/iiagjyP/womozedijupe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fcc01a027fe4.pdfIn PDF document text
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/648b35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_600f21cae1b11.pdfIn PDF document text
    • https://pibubeje.weebly.com/uploads/1/3/4/3/134374065/lepexija-xakodaj-xemaduwoja-piliva.pdfIn PDF document text
    • https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/0d317d4.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/2348242.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/loxoropaven-jasulekunu.pdfIn PDF document text
    • http://skidki-day.store/144078737871x21s.pdfIn PDF document text
    • http://otomail.business/network_security38r4k.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/ijcghbj/xolutapugalapimejivu.pdfIn PDF document text
    • http://manybigs.space/inservice_training_letters_templatesueiua.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 5476 bytes
SHA-256: 896331ca9e9fd0dcb12d9df6c27d42e8e687e9025b7e6c0c6610432ecff799fa
font_01_sfnt_off00010953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10953 10604 bytes
SHA-256: a31916dddcc7b20dd99121f2f4b91bdf5b905958bf9d46c60661d379906b9da6

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