Malicious PDF — malware analysis report

Static analysis result for SHA-256 973401c750ed4dbd…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 01:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c4bc4cf92b9d61b455d5dbd62a44354f SHA-1: da657cfb07d8d47649c0bdbb310a23bf04b0ecca SHA-256: 973401c750ed4dbd35e65bc4127e2f7e82a81f6c919298cc03f6b836cb6be001
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and metadata suggesting it is part of a link farm designed to trick users into downloading malware. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent, specifically phishing and Trojan delivery. The document body, though heavily obfuscated, contains references to 'Harry Potter und der Stein der Weisen Film Download', a common lure for pirated content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=harry+potter+und+der+stein+der+weisen+film+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476756/normal_5fd3989392e10.pdfIn PDF document text
    • https://nezikuwetop.weebly.com/uploads/1/3/5/3/135346993/e4006d427c.pdfIn PDF document text
    • https://lusebedadejaxid.weebly.com/uploads/1/3/1/4/131407110/dubiluwowebajedafo.pdfIn PDF document text
    • http://5-euro.info/kefegibutavaparagov7sh0.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/669352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5ff256d78620e.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/lavivozubaxamup-sobonogusamepa-tomakabesalu.pdfIn PDF document text
    • http://promoocaoameericanas.com/footprints_without_feet_extra_question_answer3q50r.pdfIn PDF document text
    • http://workbykoder.xyz/data_analytics_vs_machine_learning_vs_artificial_intelligencek920y.pdfIn PDF document text
    • http://load-bcp.com/94191902664au6z0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_602d4167946c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_6041649634eae.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/firigugixujotov/jelapidevilaxaza.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/atoms_vs_ions_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d20f480-6bf3-40d2-94e6-247aa48519f9/25664119806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6f930d-c191-4068-946c-f7f0ea211dd1/52334879814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13963a04-377f-410b-b82e-a50c2499713e/tutekiwavuvofunavaxenazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a41c2ce-3485-41bf-95a3-4ca7ae0c8af9/formula_para_el_volumen_de_un_prisma_octagonal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a58a21-6fec-4881-a6ee-13cb17d4c2d4/9822824402.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/apk_ram_booster_speed_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/2095149435.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_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 5224 bytes
SHA-256: 52f426410e415c34ec979284d68e6e948ff85628c9ecdc465a1a4216246d4011
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 11656 bytes
SHA-256: b05e2aca7e759a4f75df9db0f6f16ea16bac242fda223ea2ae884b8c178973d3
font_02_sfnt_off00012d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D17 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2