Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab4a0710d1eb951…

MALICIOUS

PDF

64.0 KB Created: 2021-02-18 03:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b6a06f02394b47c9380f849367fdc960 SHA-1: 81bb0599562ade7ac544ecc171252688fcf5beb2 SHA-256: 8ab4a0710d1eb95196a2086c41beea244f4af691c0949e34cfb0747f39b42f6c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=descargar+wireless+cracker+apk PDF link annotation
    • http://artelamp.store/resepatiwzfpe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427284/normal_5fe152a78417d.pdfIn PDF document text
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/6971808.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/8188819.pdfIn PDF document text
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/9062363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494140/normal_5ff4d051929b6.pdfIn PDF document text
    • http://strongcreditscore.info/letter_b_worksheets_toddlersahq0s.pdfIn PDF document text
    • http://dhl-order.info/mersal_arasan_dj_remix_songv50d4.pdfIn PDF document text
    • https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/junuma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5ffb58bbe2ccc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5ffb088243350.pdfIn PDF document text
    • https://biposekiz.weebly.com/uploads/1/3/5/3/135349949/41e9989c31.pdfIn PDF document text
    • http://kukusorukabapoj.iblogger.org/dinukuvazizuvifeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd118d17eae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5fd1440e265a8.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/4337784.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/wedevagisurawis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riremeg.rf.gd/naval_correspondence_memorandum_format.pdfIn PDF document text
    • http://ligifufeg.rf.gd/christmas_songs_piano_sheet_music_free.pdfIn PDF document text
    • http://xidozine.rf.gd/figowawem.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_off0000be9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9F 5256 bytes
SHA-256: 3a810184d24f553efa046d3d95dd4ab371c8b609b1abab5167d1503ab1dedeb1
font_01_sfnt_off0000d0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 10016 bytes
SHA-256: 5e831c4954385a170e1a362db695f4985582b51bd2f69cd38d4f1ca653f7cba3

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