Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d24c5eba410ecd…

MALICIOUS

PDF

74.5 KB Created: 2021-03-09 19:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9e327dbb0cde1330b9854e709bcbf6cd SHA-1: f0a0f125a51c1d1105cd4fdbd8d0f8459e28494f SHA-256: 25d24c5eba410ecd7d6d22886e3aa563f3b0925672e703289d52925336e8744c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains external URIs. The primary malicious URL, https://maypoin.ru/award?keyword=squat+challenge+home+edition+pdf, is embedded within the document, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/award?keyword=squat+challenge+home+edition+pdf PDF link annotation
    • http://wegaturagifo.getenjoyment.net/76447822841.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/91668871439.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/Ahhe0pu/24170519331.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/g35axap/dino_dash_all_boxes.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/gzZtjhV/vifuwum.pdfIn PDF document text
    • http://sizegivip.22web.org/adblock_chrome_mobile_android.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/lhejfjS/gexaxugeke.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/gie65h6/talking_angela_toy_app.pdfIn PDF document text
    • http://gikixeg.22web.org/marathi_vyakaran_book_free_download.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/bryant_plus_80_trouble_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/176f0df9-78f6-49d4-89d1-a8db4d985508/isaac_asimov_foundation_series_book_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0573195-39a4-4a96-8789-5f092b337481/widewa.pdfIn PDF document text
    • http://baxodivol.rf.gd/frigidaire_70_pint_dehumidifier_instruction_manual.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_444e892518a34c8a9a049570e8fa29cd.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_2b27634747da4cf1a87a2dd002eb4c64.pdf?index=trueIn PDF document text
    • http://ligujizulogi.atwebpages.com/pioneer_vsx_523_specs.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_41081261da9a4f51baf41abf72a206fb.pdf?index=trueIn PDF document text
    • http://fojosotum.myartsonline.com/baby_shower_checklist.pdfIn PDF document text
    • http://jeburam.epizy.com/personality_disorder_worksheet.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_96b9eff77dbd447ba3d7d62ef2050b27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de0f86c-12fc-4725-b175-1ad1e0573708/classic_salmon_fly_tying_materials_for_sale.pdfIn PDF document text
    • http://jipinasin.epizy.com/vuxojut.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_off0000e7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 5524 bytes
SHA-256: 8e1aae86b32fa8f5d5484a8b092190122cacaa8f39d754d13f40cbfe2b7c3940
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 10272 bytes
SHA-256: b8a07a3d96f8e6a9b6e5965aac6adffd70d3a902ff9f3a764138bc03789f0486

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