Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce77ace78cf9f278…

MALICIOUS

PDF

71.9 KB Created: 2021-05-03 20:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fa035e13a526c1c46e13d4f88ca58ef1 SHA-1: 742ff37c65376afd10268bb7ea90a9f05f860d14 SHA-256: ce77ace78cf9f278e653dfcc2a25306a1edc6f85438e134d5fee844c5dbfe3f0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://maypoin.ru/strik?utm_term=spyder+xtra+custom+paintball+gun PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499636/normal_603e9ed6f114a.pdfIn PDF document text
    • http://pipvip.ru/zenith_transoceanic_r7000-2_service_manuales5rb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_6056878d0f5a2.pdfIn PDF document text
    • https://kanapefa.weebly.com/uploads/1/3/2/7/132740413/fogovu-soduvuj-gimawosulu-zomugalaxa.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/fbd501b.pdfIn PDF document text
    • http://yozi.store/new_tamil_movies_2019_free_tamilrockersq5qku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368970/normal_5fc5f29c2dc92.pdfIn PDF document text
    • http://wildboost.club/new_english_font_design_freet6fcp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_6049f5fcab3fa.pdfIn PDF document text
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/8365008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_605a8dbf2dccd.pdfIn PDF document text
    • https://suludexa.weebly.com/uploads/1/3/5/3/135314517/1286503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/jogawigilonadukenip.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/79730343577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b69af4-a28a-47d1-8958-e1fc7c2b1796/67426096841.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_6e35df860ff94daeb7948562f39d8026.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_fe327a7b53f1428fae56acb149233880.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixolose/is_the_alienist_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdf8850-cb69-4bf4-8260-d9cd782b554e/mississippi_drivers_license_renewal_locations.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_1402438ce5344dcf92001ea31611a1a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/daffynition_decoder_answer_key_d-_62.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9799b154-32d9-4876-8966-4da7bfea4f18/49488941808.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_off0000d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89D 5808 bytes
SHA-256: bbd155035d0fbd45fcf16a3e36cc408b95062ef06d37c1f2e1b175d12b20a426
font_01_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 11092 bytes
SHA-256: e1154ffde0c13ea2b05830e432ce9ee0a37e1b7acde7637fd36d0cdae89638e5

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