Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b27c93a5dd3dc19…

MALICIOUS

PDF

73.2 KB Created: 2021-03-20 10:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 31202bda1a5afff45fb3d6ccb1e71758 SHA-1: af761fdd23554b2aa59b721c33a97ccbe973760b SHA-256: 2b27c93a5dd3dc198797355c3eed2e43802c40bcd7d17a35b88280b1d942b92e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to distribute malware or conduct phishing. The embedded URLs point to suspicious domains, reinforcing the phishing or malware distribution vector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=ansiedad+en+adolescentes+tesis+pdf PDF link annotation
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/4671248.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gjCghlH/wurigavenumulimolaveje.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/95883370271.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/muxaxa.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/leaflet_bahaya_merokok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5ff97f3323953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_60301208b3785.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/aoac_991._14.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/bijijhk/business_strategy_game_quiz_1_answers_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/gpgfqic/where_s_my_droid_apk_pro.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/fc881529.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/bubasupidujiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/gjfFacP/lopefivadawasobewuwuje.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/Fpifjar/bodesulujaxuxekajesew.pdfIn PDF document text
    • https://pomugulawes.weebly.com/uploads/1/3/0/8/130814995/1238087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fd6754e6682c.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://nujugeteteda.myartsonline.com/36439889210.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_3e11ce84ce5c46f6b0013c2dfa414e5d.pdf?index=trueIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_264e729f4fe14bac971d73d4560a1b4f.pdf?index=trueIn 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_off0000d199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 4828 bytes
SHA-256: a9d9bef53ffaeef619d97c8d174919ca065e986ffd1b8884a6124c8b930c9f4a
font_01_sfnt_off0000e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 11500 bytes
SHA-256: 86e94e533a71b1ffffa559e753e24d5693a32f90a6abc149bd5a42c78deafd58
font_02_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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