Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ae5d5bf14a0361…

MALICIOUS

PDF

80.4 KB Created: 2021-03-10 19:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6c561490b56de8a7c9d462a58b3f9ebd SHA-1: dbcf60cda91e01d24b00268681a139a61472737a SHA-256: c1ae5d5bf14a03619baeb170834c907f9f768a7d91a7ed2611acc2c5adcff921
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to 'https://baarspo.ru/strik?utm_term=what+is+customer+perception+definition', suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, further supporting a malicious intent to direct users to external sites. The ML classifier and ClamAV detection strongly indicate malicious content.

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 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.
  • 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/strik?utm_term=what+is+customer+perception+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501791/normal_602013eb72524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_600b6c38a4b16.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/9983962.pdfIn PDF document text
    • https://vaxulazazoju.weebly.com/uploads/1/3/4/5/134587837/1628756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fd6f204babfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_603c0533bf7a3.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/7672989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5fcb6dc47326e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_6047fde4caeae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fdf3bb60696e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_603f764bda0a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443815/normal_5fc8d68cf32cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5ff5100fed196.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/nodetuxapabara/queen_fitted_sheets_sold_separately.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/all_black_song_djyoungster.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/crackle_movies_and_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/49465296606.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/32050100550.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/rafutunewuxuxuzewoxerulu.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/77711848117.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_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 5260 bytes
SHA-256: 453007b3ad5d30e972063d38cbf2f6f6040c85ccde533dc0b0d489d9e2a95ac0
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 10448 bytes
SHA-256: badc84285edde09b5fca3b310f7722ca314371af281c00df94aac4ba051a2b0e
font_02_sfnt_off000125e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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