Malicious PDF — malware analysis report

Static analysis result for SHA-256 684f11d2ac7c8f03…

MALICIOUS

PDF

82.5 KB Created: 2021-03-05 21:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 448ed2cb67430771379a7bb699803fab SHA-1: 83d346db2dc789d43d67ed8794ff3a12922a2306 SHA-256: 684f11d2ac7c8f03f956c070a5b6f8fe155b08471eaf647d13a0456221f80fdc
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing campaign. The document body, though truncated, includes a search query related to a popular app, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://soxebez.ru/strik?utm_term=weight+watchers+app+not+working+2020 PDF link annotation
    • http://creamwalls.online/xidogafoxupaj3vitb.pdfIn PDF document text
    • http://helpcopyright-service.com/galelapakh56i3.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/wigotekinazemerux.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/2563363.pdfIn PDF document text
    • https://tapoduxumusuna.weebly.com/uploads/1/3/4/7/134733142/sopoxoxebozus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_60090cf924ea2.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/gegom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601ac5f163951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_601070c9d276b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fd7ba2a2d088.pdfIn PDF document text
    • https://gebawifu.weebly.com/uploads/1/3/1/4/131483167/8058545.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/woxewiwupir/free_email_template_plugin_wordpress.pdfIn PDF document text
    • http://xewepipesu.epizy.com/27488135545.pdfIn PDF document text
    • http://nogomazarem.epizy.com/63802248849.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/zaretuteluzawexibujutadom.pdfIn PDF document text
    • http://risafusimuwo.rf.gd/lemobodesovixifojob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5392 bytes
SHA-256: 6336ac41a24420d0ddc2bdb411bec4142114b410e14c9f56617ea895d414d0b4
font_01_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 11636 bytes
SHA-256: 0efe57bd7279c262dc4bceb7b922cc6148cd4fd1fff36a73756dbfc8f235d755
font_02_sfnt_off00012f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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