Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cdaadab2cce975…

MALICIOUS

PDF

80.2 KB Created: 2021-01-31 20:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8b607797a262154cd986452f5679efed SHA-1: 2b5ba9e502fdf79ab79183b6053e6d278e239f92 SHA-256: 72cdaadab2cce975e6869669101af5b4958e5d5d9602bb6d337aef0d5cdb96af
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL and the document body's reference to a 'loan interest calculator' serve as a lure to direct users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=loan+interest+calculator+excel+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476011/normal_5fe3af0e659d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/o3i2rhh/xegoriketokufotarafubeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fd78e880603b.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/Wyhf6jd/minecraft_classic_combat_mod_1._14._4.pdfIn PDF document text
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/kozobutukofavute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fffcd9f622ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5fcef5d68bfa7.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/1427175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_601403a11a201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_5fe84b7426cb1.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/2895413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5fe097ab31a2a.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/f29dc73d4c4a0d.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/aggxhe8/cowbellpedia_maths_quiz_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_600c1d817dfad.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/adedd717e.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/3856433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465127/normal_5ff551b813286.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/vovopafubipu/bodybuilder_images_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/aeronautical_information_publication_aip_turkey.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/retal.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_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 4768 bytes
SHA-256: d3cb804656d9705b08d27b8f20bc232ab44808c2424e93d30965b0584adc5f1a
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 10536 bytes
SHA-256: d3adf32a4d68ec8682b86f0f957829302a959841df34cdd671fd727d3929d789
font_02_sfnt_off0001256f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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