Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe3d0a8a9fe8f22…

MALICIOUS

PDF

83.1 KB Created: 2021-03-02 00:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 04851aae0a6bf254564d711248a843b9 SHA-1: 6f1f3808d0578bf758740aa2a7b1664213450861 SHA-256: 0fe3d0a8a9fe8f222d5e67cfba18d097b0b226e2488f13e976140cacf63adc4a
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one prominent URL leading to a suspicious domain. The document body, though partially obfuscated, suggests a lure related to job interview questions. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=interview+questions+for+call+center+supervisor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491965/normal_60181f72a52df.pdfIn PDF document text
    • http://my-credit.info/theme_store_for_any_android88zj8.pdfIn PDF document text
    • http://voiprormul.xyz/bipaxodelamuzetizijewulivnxiy1.pdfIn PDF document text
    • http://shopsmmv.site/tai_chi_24_form_listopxpg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ff552147515b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5fccbc6e4fbac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476420/normal_5fced4881350b.pdfIn PDF document text
    • http://revershjtb.site/tujigelokuwjfom6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443362/normal_5fd6e120da639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459464/normal_60062356b0da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_603b5d82dcdaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_5fe66f34ac23e.pdfIn PDF document text
    • http://yesnutural.space/adding_fractions_grade_5_worksheets29qa1.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/zowibatev/vaponereneji.pdfIn PDF document text
    • http://xudaribewipibe.rf.gd/batman_returns_gba.pdfIn PDF document text
    • http://vegewamofuxa.rf.gd/75381866586.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_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 5104 bytes
SHA-256: adea71f21cc30f8933e82e80883436b7e363ccd5e3d983bd2e6494de157c5cd5
font_01_sfnt_off00010bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 10908 bytes
SHA-256: 2c082e5dd194bdcbae028888cd95ccf57da6dd11cd38478edfc5ec5f66d902a8
font_02_sfnt_off000130d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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