Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8924618d4dc09d…

MALICIOUS

PDF

86.7 KB Created: 2021-02-22 10:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f952a4685ffdd81b3604c102e64dc3f6 SHA-1: 3d33887533ad57a076891a02f441827e63c0ad66 SHA-256: 8f8924618d4dc09df293b170980569d329890acd68d808e4cb29e9f90caac716
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'difficult maths questions with answers pdf'. The presence of an external URI and the overall detection profile point to a phishing attack leveraging a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=difficult+maths+questions+with+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/pozigafo/gdhgDqN/somotixosoferaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_60137785f412f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_5fdc5ce90cf77.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/8jajbN0/run_race_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vexedobasof/hficlgi/warframe_market_riven.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5ff14c4fe4a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_601185e725e8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477892/normal_5ffa5ade97bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd217587666f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fcbd475a478c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fe7013b8fa33.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/xaliwalufoguni/47762201113.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/atm_card_form_sbi.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/gesaguzesikapatekiwubelep.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/71862876437.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_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 5492 bytes
SHA-256: fe8e0821c3c586083771402fc64f9ab7700eaca5645d3b660b561461c4406f43
font_01_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 10340 bytes
SHA-256: ff98a037026fd00b3614b1a3d9ebb69ea625c1eec18896c8f02db8c6e4bdbfb7
font_02_sfnt_off00013f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.