Malicious PDF — malware analysis report

Static analysis result for SHA-256 3225bc8bc3ed89b2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-11 12:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ac81988e873739dc688018be4e569857 SHA-1: 44b2ad5d3db46b614f50c70be15014bba74085ad SHA-256: 3225bc8bc3ed89b215c36795907c0d344fc51fa4936031f804dfa80f8969c6dd
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating it functions as a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to external content, possibly for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=vitamix+6300+owners+manual PDF link annotation
    • https://kavezebox.weebly.com/uploads/1/3/0/8/130814004/1384794.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/gfWgiCY/vuzapijadij.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/LZgjBpK/plants_vs_zombies_xmas_mod.pdfIn PDF document text
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/wotazefek-wejinam.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/iAKhdgd/78161917166.pdfIn PDF document text
    • https://kominuxopexazi.weebly.com/uploads/1/3/0/8/130814675/wonijase.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/WigOyje/46130337341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_602a8d4385fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_602e3e4a30a95.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/i9iaUC3/bixiterepe.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/konakojituj.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/wonosepasitibodefato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_5ff79e4df2806.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/gelL6ic/human_fall_flat_christmas_achievement_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5fdb7946812e7.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/ijhd9he/agar._io_free_online_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0125d3b2-753e-4164-925f-e09e8062b044/lekikavilimudovisevaze.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/winologutukazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90aa765b-5291-43dd-91e4-7f59a61b232d/comcast_remote_control_code_for_onn_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/20341242663.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/balangan_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/rhipsalis_capilliformis_care.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b75a72-0450-4094-9a10-aaed39d9041a/simagexuzufokol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87366ca-ba1a-4e7b-8ffe-c11ad9dcc3c6/gunesu.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_off0000df8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8F 5416 bytes
SHA-256: 92c80035b4f7f73b617284f869c6512c205aad1af34874e69ab170df15c9eaa4
font_01_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 10424 bytes
SHA-256: da84b4b8fe5c0d55122de802f02fff5055ea22f34d714430d807fb3c18e8e32b