Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f385b38163babb…

MALICIOUS

PDF

70.8 KB Created: 2021-06-03 14:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c1a85bb40bb00fe502d6098b8af877b7 SHA-1: 35c2e0aab725de8b2d640333e3c3f1aa52d92804 SHA-256: 64f385b38163babbaf2595b051d855026aa0cc83ed0e7b82cdba5215449ae03d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of a 'download' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/pbw?utm_term=oh+bad+boy+boom+boom+mp3+song+free+download PDF link annotation
    • https://kolekidir.weebly.com/uploads/1/3/4/4/134441437/kiriwazegegezanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_60b8b5b2c491a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_600aa8fdef4bf.pdfIn PDF document text
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/suweketome.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/4130222.pdfIn PDF document text
    • https://lumekagaxegi.weebly.com/uploads/1/3/2/7/132712489/c5c1bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_606dc8919c155.pdfIn PDF document text
    • https://xazupegenam.weebly.com/uploads/1/3/2/6/132695472/0c90f20dacf9f.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/7420624.pdfIn PDF document text
    • https://mamowoxu.weebly.com/uploads/1/3/4/2/134265364/kuserogubabewinajabu.pdfIn PDF document text
    • https://zijuwufe.weebly.com/uploads/1/3/7/5/137518410/4729670.pdfIn PDF document text
    • https://dajikapepexav.weebly.com/uploads/1/3/4/5/134597014/wepuximojepikatas.pdfIn PDF document text
    • https://dosemawa.weebly.com/uploads/1/3/5/3/135388865/nesiworejar_mukelegexet_gozagolisaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_60469aa0c4918.pdfIn PDF document text
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/6458095.pdfIn PDF document text
    • https://lonexababite.weebly.com/uploads/1/3/1/1/131163854/zafavinejipotigol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6058c91e7e107.pdfIn PDF document text
    • https://rowiranuzexu.weebly.com/uploads/1/3/4/4/134436227/db32353f2d.pdfIn PDF document text
    • https://xoselobukakuri.weebly.com/uploads/1/3/4/4/134498653/rewisadapawefi.pdfIn PDF document text
    • https://nitejaxerovon.weebly.com/uploads/1/3/1/3/131379530/modej_lifotoviwase_sarimi.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/06d063b8-b01d-4bb5-966c-253c915f9328/16389676023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30facf4-1bb1-4451-a018-6769568b7529/velosedagotebisavewewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759e6068-b329-4f6f-b575-892753247520/leaf_by_niggle_j._r._r._tolkien.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_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 5980 bytes
SHA-256: da5dd3256a1733204c357872b56074850907163e2689046231c00805494f0159
font_01_sfnt_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 10112 bytes
SHA-256: 5d20b42ef119b4ac02fbd12779692d536ba472a250d50fe853902cfc3cd3377f

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