Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeb7d85b97fd6b8…

MALICIOUS

PDF

70.0 KB Created: 2021-06-12 07:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1d24e60d31e6d9f38d1bfbbd63ebde3c SHA-1: 0f1833dcffc39fb15b9784f9e74aaf110851f815 SHA-256: adeb7d85b97fd6b8a74c61b7cee0920bcdd84921e078e9d3864cfc1564a748c9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, and contains a significant number of external links. The heuristic PDF_SEO_LINK_FARM indicates a link farm structure, with many links pointing to disposable hosting. The primary URL, https://philabc.ru/pbw?utm_term=swag+iq+game, suggests a potential phishing or scam lure.

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://philabc.ru/pbw?utm_term=swag+iq+game PDF link annotation
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/6845869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_60bd3000799db.pdfIn PDF document text
    • https://pazibeze.weebly.com/uploads/1/3/1/6/131636707/1650645.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/2742689.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413373/normal_60b6ac98a1f3c.pdfIn PDF document text
    • https://gugamuwapubadek.weebly.com/uploads/1/3/0/7/130740318/5ce8cc.pdfIn PDF document text
    • https://jexurelo.weebly.com/uploads/1/3/4/8/134853401/numuwodizovonu_jarejumetegeb.pdfIn PDF document text
    • https://powipawi.weebly.com/uploads/1/3/4/3/134313445/1856c2f0.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/jifarowabiv.pdfIn PDF document text
    • https://vutetubefot.weebly.com/uploads/1/3/4/4/134431977/jonupumevono.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/zuvuz-nutewaniremi-tibiwitofe-pikelom.pdfIn PDF document text
    • https://jaguzepababiz.weebly.com/uploads/1/3/4/4/134493377/5428164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwitanul.pbworks.com/f/fonelab_for_android_registration_code_3.0.186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0d7bea-42c9-48c1-9cf9-82f877edd0aa/borobolenolaronejiv.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144423390/6769094765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9ef107-e64a-4445-a1f5-73142075e498/lugolulebipagubo.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/age_of_civilization_2_apk_free_download_android.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_off0000d4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AE 5020 bytes
SHA-256: 40a6c0403d36d6c2109e1d3fd7fc9cb54974852f76ebbdb8ab028a565dba8fc0
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 11032 bytes
SHA-256: 4f0e629e456041f1d601c5af0568d502eeff83dbc95679348343de06add37a98

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