Malicious PDF — malware analysis report

Static analysis result for SHA-256 902427a44ce6a90e…

MALICIOUS

PDF

79.3 KB Created: 2021-03-23 08:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c6449341914e7645934471381529b59 SHA-1: 9b4c1e2a49c68b83955bc9de30fbe01330d802a0 SHA-256: 902427a44ce6a90e6d4c90b7632238057f365af2c226f7a0a5da0fe71a703221
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though truncated, suggests a lure related to football regulations, directing users to a URL that appears to be a keyword-based redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/wix?keyword=reglamento+de+futbol+2019 PDF link annotation
    • http://clientesdkb.com/la_chica_de_ipanema_acordesex82c.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/industrial_agroforestry.pdfIn PDF document text
    • http://vsedlyatebya.xyz/tp_link_av500_nano_powerline_adapter_manuallfyre.pdfIn PDF document text
    • http://save50it.info/craftsman_radial_arm_saw_motor_bearingswvymu.pdfIn PDF document text
    • http://sodaapp.pro/nizipisawubofosofiborovnf3t.pdfIn PDF document text
    • http://natbeach.space/22884058046h6pqi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5ff6a0a87a783.pdfIn PDF document text
    • http://tophomework.space/ninjas_infinity_2_modpanby.pdfIn PDF document text
    • http://mivetys.xyz/best_reporting_tools_in_data_warehousingi9lcr.pdfIn PDF document text
    • http://goproonly.com/practically_cheating_statistics_handbook_3rd_editionkrpwk.pdfIn PDF document text
    • http://alex-chekalev.com/how_to_get_your_hardship_license_in_arkansas31oo9.pdfIn PDF document text
    • http://ogranicbio.fun/the_promised_land_piano_sheet_musiczot8h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_5fd32d864d552.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/87941537874.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/67395249925.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
    • http://teredibake.rf.gd/22957948222.pdfIn PDF document text
    • http://lizixubo.epizy.com/mexajexivasifovoneg.pdfIn PDF document text
    • http://pawajoxonebozew.rf.gd/47648529529.pdfIn PDF document text
    • http://ruvuzatopaz.rf.gd/maths_matrix_questions_answers.pdfIn PDF document text
    • http://konapupezek.rf.gd/bulelar.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/angular_material_form_template_example.pdfIn PDF document text
    • http://pozajuw.atwebpages.com/pirudoxabebisiv.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5416 bytes
SHA-256: 93e39882476af4a36780efc73835a36c0d22497f971ad4a7cdf0c4c3ec4d011a
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 11128 bytes
SHA-256: 4e3402c42ba360475e4cc5b93165fc04d48a6bb07813cfd906fe83f3c7998142
font_02_sfnt_off000121bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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