Malicious PDF — malware analysis report

Static analysis result for SHA-256 730894b82a077491…

MALICIOUS

PDF

80.0 KB Created: 2021-02-14 09:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bc7ac398345a113cfe30c7b1ca3afd69 SHA-1: 040cb0758481fafa379ef8bc1d3fc2d1014cc568 SHA-256: 730894b82a077491927df14c6d1762e27ee337281b61015399aac90074cec437
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to hacking, and an external URI pointing to 'baarspo.ru' was extracted, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing attack.

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://baarspo.ru/wix?keyword=how+to+hack+bullet+force+computer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5fcce272cd62e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5fc9920664e0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6021f31d68940.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fda7a49c987c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5fc8e333e4a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_6020be8006b76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_6016516604d75.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/mexesazaxasa/wikafonuvezaxoxor.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/57284108671.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/buwerisutojimulal.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/kixanerozojuvuf.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/net_framework_4._7_2.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/53776663165.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/gapiketire.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/walofakewuvew.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/unstoppable_the_score_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/fumojun.pdfIn PDF document text
    • http://nomekerileme.epizy.com/12176207035.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 5064 bytes
SHA-256: 87e5088d36def05e9098c31a29cc732c9e2664f42976c0d1afbe4f0ff57ff087
font_01_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 10136 bytes
SHA-256: c9e8e42050629f8edece9672682479744cb657a0bbb1be3c743e144a98824bf4
font_02_sfnt_off00012485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12485 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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