Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ed74b96a0436b8…

MALICIOUS

PDF

115.8 KB Created: 2020-12-03 10:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c3a6d167518763831b2ccceb4bd2771b SHA-1: d51bab94963e0bb978efd8acf9b80aa0e286204e SHA-256: b6ed74b96a0436b803f09427c833cd6815d1fbc7418b6bb959856c232d0456d9
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of urgency language further supports a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=instant+power+main+line+cleaner+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fa1491df0f82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f9f7336f21e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496815/normal_5faee13b9d433.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/bfe8426fb8ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fa1ed8ca4622.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/vuvip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fokapikow/picsart_photo_editor_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52da53c-3ea2-42d6-844a-30983212ae5c/kezote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60af4d18-9610-4d5f-815a-0561b3db4503/al_otro_lado_de_la_linea_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437e592d-f581-47fc-97f9-cbb4cef871c4/lfs_dds_dosyas_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f6d83d-d13a-4814-8429-93f726e3c49f/24987360907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f677c69-950b-4685-8a50-c2570e3a6497/babumoshai_bandookbaaz_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e350cec0-e41e-4b4b-9d7d-aa465838603f/50968111583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06b5f87-36ad-46c9-9dc2-9573fb4fb691/sadisepefuwufeworutasesan.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18975 5108 bytes
SHA-256: ba5349018574bcd332c8950ec7da0508c058cbddbcdae0feca3c1c83119270ff
font_01_sfnt_off00019ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD2 11492 bytes
SHA-256: 6a7b1c6a6be779ac5034d141de37211329a7b70bc26a8c22aa22ac29e8c03895

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