Malicious PDF — malware analysis report

Static analysis result for SHA-256 8deb70cdbdfa68c4…

MALICIOUS

PDF

83.5 KB Created: 2021-05-18 20:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ed683e7e989827d21a538bc77453592d SHA-1: 721c24c9fc3f299cbaf017b99197be8d5e89e820 SHA-256: 8deb70cdbdfa68c48a730d7b6b5d2543b9f5fcafd23b9d5b5d3b4c46a2784e92
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO scam. The primary lure URL, 'https://druttle.ru/strik?utm_term=download+rom+pokemon+fire+red+v1.0+us', indicates a phishing attempt disguised as a game download. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=download+rom+pokemon+fire+red+v1.0+us PDF link annotation
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/goliparofa.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/3719388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5ff22c9828c08.pdfIn PDF document text
    • https://witokilufixag.weebly.com/uploads/1/3/4/7/134739393/likidenuk_xatalovudadamas_jakipiponedive.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/ponubema-sisetulotutijap-fufumowupowiv.pdfIn PDF document text
    • https://julalawigito.weebly.com/uploads/1/3/4/8/134869680/tubomogejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_602c360dc4743.pdfIn PDF document text
    • https://fuvuliles.weebly.com/uploads/1/3/4/9/134904701/najalotov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_60584a4703df5.pdfIn PDF document text
    • https://ropupapufodugut.weebly.com/uploads/1/3/4/6/134650221/furin-buxamod-bimonodi-guwonezuno.pdfIn PDF document text
    • https://lokowukaf.weebly.com/uploads/1/3/4/3/134315315/burogepigedujejadu.pdfIn PDF document text
    • https://bowineno.weebly.com/uploads/1/3/4/8/134868267/3231494.pdfIn PDF document text
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/wegig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/somamere/strong_password_definition_requirements_and_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/supewuvas.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/pifupovolifidoweta.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/whatsapp_video_2019_odia_wapwon.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/jezifaxova.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/39657587078.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 5432 bytes
SHA-256: 40b533be62423f1a07018c61e17c69a3f8c63129f3dd7cc9b8627fe8d9312562
font_01_sfnt_off0000fb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0B 5672 bytes
SHA-256: 22edd0c95b2b88f47335a7f421083b30ab220341e612c351e07b735c683acbe8
font_02_sfnt_off00010cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 10880 bytes
SHA-256: bec1dc1df971ba1d1cab278f8fc0c540136faaae8a3d2c26ff12a756c80016d0
font_03_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2