Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3e80eea702949c…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 09:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 76f79508c3994989221ea55bd28380da SHA-1: 5d934fb0bb11728a1eebdb0fd796069554e8e387 SHA-256: 0a3e80eea702949c119a88e1eda8e720f72d51cdd5c8c64cf6f15c322034eb61
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 0.9989

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/123?utm_term=hello+apps+whatsapp+status PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370540/normal_601a2f8e80752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fdb8aeba2eea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_6005b1f963cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_60283f36b11ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_60394c20b24cf.pdfIn PDF document text
    • http://wilozobugo.iblogger.org/wolf_oven_self_clean_time.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/furamub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fc60f66f351c.pdfIn PDF document text
    • http://lonukadezejitiz.22web.org/dowry_act_1961_in_marathi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_603ea186e0f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_600e318883776.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/gcESZ6o/change_eye_color_permanently_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5ff69d9cbe1b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_602a0aa4103e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_605306247df45.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/hc8jdUf/sasupeka.pdfIn PDF document text
    • http://tuworiki.22web.org/nibegodanalu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416930/normal_5ff556d84588d.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/ccowlie/com._dark_blue_creations._counter._zombie._battle._simulators.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/xuzed/bunker_hill_security_system_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/53179762942.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/57628898144.pdfIn PDF document text
    • http://kizebemifovexe.rf.gd/63718127890.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/nawanepepofexoloz.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000da98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA98 6416 bytes
SHA-256: 15f1f49b80f446e7933a40d6c5645ba9b1ad3ddb6c90b7ed74ec66770e7def8a
font_01_sfnt_off0000ea61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA61 4864 bytes
SHA-256: 2fc6e45849af4bf0ce3b60a6502d66fb54d3e39e11c6ea297a21720cbc094e3a
font_02_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 11140 bytes
SHA-256: 13e8d8f6bf78b6d954f92f538d84b5209f4173405f1f6876387139b71938d212

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