Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a63848c23a0c7d…

MALICIOUS

PDF

71.0 KB Created: 2021-03-03 12:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2c8161a89be970a2bfef0cb8a42a9aa SHA-1: 321ff80315acd084ec0057bebd36486687ebcd0f SHA-256: 90a63848c23a0c7db0165580945463a5a0993507b9a39b1bc619d7f7adfa42d7
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=indirect+proof+worksheet+answers In PDF document text
    • http://fasekafalig.scienceontheweb.net/68172099452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5ffa8b7464bbf.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/8hdEpgj/59044265226.pdfIn PDF document text
    • https://goladamopalej.weebly.com/uploads/1/3/1/3/131397974/novibopinixo.pdfIn PDF document text
    • https://tubuporupuruder.weebly.com/uploads/1/3/4/8/134879971/e9f1490c99c.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/40257941507.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/jegorasamese_bawivotuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/gidewura/Vggghhg/51403353386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_5fe6559774607.pdfIn PDF document text
    • http://rujajabejeveto.66ghz.com/3092473086.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/34504937380.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/4578348.pdfIn PDF document text
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/fejewilenatosa_pifezipusi.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/how_much_is_hp_stream_11_in_nigeria.pdfIn PDF document text
    • http://lefavapexusa.iblogger.org/architects_salary_guide_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5fd9d7409ab25.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/Ngj5mul/rocket_man_song_meaning_drugs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5304 bytes
SHA-256: 8fb12936a9a151339860a40aad78155b5cde7cd9f57dac17a4f7920c2aa65c29
font_01_sfnt_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 10200 bytes
SHA-256: 5eb4c6af0fe5e41fcd3c880abd7f3fb89abf015a3ff7cfca7ca35b4098ccaf30

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