Malicious PDF — malware analysis report

Static analysis result for SHA-256 1293b88a33f2da7b…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 18:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cc13731cc1abd0cddfdbac4df0cca621 SHA-1: 282e5d1bacaa5adfca42b4c45cbf5a3e360a3d07 SHA-256: 1293b88a33f2da7bd59c735709e3ccceb548111aee7be5d3f4540bbafd2d600a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://golowaki.ru/wix?keyword=free+craigslist+flagging+software PDF link annotation
    • http://dikiradojasika.iblogger.org/xojojasezokadukinomi.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/75847535908.pdfIn PDF document text
    • http://kagesixeti.22web.org/55938334177.pdfIn PDF document text
    • http://sefabesegasedan.22web.org/pomewuvove.pdfIn PDF document text
    • http://fovijivil.iblogger.org/juridiska_biblioteket_uppsala_mnesguide.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://wunekoxewufomaf.epizy.com/guide_to_graduate_programs_in_clinical_psychology.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_eace20fabb704d9b8d1a3ae3b54e1201.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/tasodijuxukabubotuluvedan.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_bc4f90b4232946f082a10da7a1ac0444.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_8a42050fcbdd4c64b28c8a03abf10bb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/vpnbook_for_windows_10.pdfIn PDF document text
    • http://vawazovuvisu.rf.gd/61111874192.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_514f959669b1462e9b4982978012dff3.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_95555ff7274c43fc930cc1d4b24489ed.pdf?index=trueIn PDF document text
    • http://zumewozuzetarun.epizy.com/35996356562.pdfIn PDF document text
    • http://fogusevo.epizy.com/role_of_biomarkers_in_environmental_risk_assessment.pdfIn PDF document text
    • http://ribitotuv.epizy.com/86931079089.pdfIn PDF document text
    • http://merojupamen.epizy.com/smack_that_tamil_remix.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/deed_of_sale_of_land.pdfIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_62aaa34322ef4723851a75ccdd3546c9.pdf?index=trueIn PDF document text
    • http://podawixixuxon.epizy.com/sagomezar.pdfIn PDF document text
    • http://jifaradazuzigo.rf.gd/what_is_phenytoin_hypersensitivity_syndrome.pdfIn PDF document text
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_8a161fec2b504c5399a449fc89612322.pdf?index=trueIn PDF document text
    • http://lupumik.rf.gd/certify_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/juropesimefis.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/google_chrome_new_update_android.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_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 4884 bytes
SHA-256: edc7e0b43bdc0a51ff778f1c76d7569035471f54cf094f18b37a479de7aa689f
font_01_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 10688 bytes
SHA-256: 1450a2455d24eb8b4493894ca930066ba9fc5ee35244a70eba5c1270ad1d896d
font_02_sfnt_off0001234a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361