Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6cbf465addecbd…

MALICIOUS

PDF

70.9 KB Created: 2021-04-03 11:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbfc7046b130fec86feb81c1ba72f01b SHA-1: 260585cd46c8c9eff74e0907e76406cf9923b282 SHA-256: ff6cbf465addecbd115f3172ab98311692b3ed03360ddb38601c6418fccfa80a
154 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and numerous other unknown URLs, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/award?keyword=planck+s+law+pdf
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/jebepojuba-jetawemu-zinuwaditos-rabawudibeges.pdf
    • http://dosijefa.mypressonline.com/tigejufirugujap.pdf
    • http://shoppermarket.online/92624501944pw3k7.pdf
    • http://pihodze.com/how_to_get_purple_materia_ff7_remaker4b8p.pdf
    • http://kepukarob.sportsontheweb.net/pijirerezuzawile.pdf
    • http://tadajixilatu.scienceontheweb.net/nubanogezumadolezuniwepo.pdf
    • http://trokot-tonirovka.online/349528648738jky8.pdf
    • http://woziwowariv.sportsontheweb.net/2010_lexus_rx_350_for_sale_by_owner.pdf
    • https://fobepuwup.weebly.com/uploads/1/3/1/0/131070598/faludisugobuku_lagegutidu_powezekudeze_jezaxesezokag.pdf
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/3859448.pdf
    • http://eliyalte.com/bonaventure_cemetery_self_guided_walking_tourik4lo.pdf
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/6479d777.pdf
    • http://tupaxeguna.scienceontheweb.net/simplilearn_digital_marketing_course_free_download.pdf
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/aed92b0d27835.pdf
    • http://idealica-itufficiale.website/xuwezedipurolakof4527s.pdf
    • http://palikexifumalam.mywebcommunity.org/ariens_sno_tek_24_price.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xixonu/visual_studio_2019_keyboard_shortcuts_cheat_sheet.pdf
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_b937f3d0abf34668b58d2e40579037c5.pdf?index=true
    • https://s3.amazonaws.com/fomudebipefasu/bissell_proheat_2x_revolution_pet_problems.pdf
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_580d2e57154e4b8eab92917f87a1adbf.pdf?index=true
    • https://s3.amazonaws.com/dukavunivifa/67436793769.pdf
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_a6ded9ce87564a8e9485ba68fc57d68f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6f2.bin
47c1bc192bbbb37b6dbd9d6fd2e946c4a314480be891257c0bd9aa53c4ec2822		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 5208 bytes
font_01_sfnt_off0000e8d4.bin
9bf9abd514fa6f592436a8350fb7f8217eb2260dc8e81aa8fd2e47d140d55311		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 11196 bytes

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