Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d761723fe746ed…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 00:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bbe220e87c42fe934a055e8f4b843602 SHA-1: 5801b69ae45a69705579a2de2b37bc8272269e49 SHA-256: e8d761723fe746ed64ca9fbf3fe26ba64a5931430836fb128097f46a5cf2056c
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, while appearing as a printer troubleshooting query, is likely a lure to direct users to these malicious external sites.

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://bologen.ru/aws?utm_term=why+is+my+canon+g3600+printer+not+printing+black PDF link annotation
    • https://tewifevorifoja.weebly.com/uploads/1/3/4/3/134387655/1930215.pdfIn PDF document text
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/lukubegafo-juvamolowenixe-gakatuvene-tiduwulo.pdfIn PDF document text
    • http://matrixbicycles.com/bovabaluteletufeu7o1.pdfIn PDF document text
    • http://testvvd.xyz/rupepumedefiwakexawilam7m34.pdfIn PDF document text
    • https://biposekiz.weebly.com/uploads/1/3/5/3/135349949/2912220.pdfIn PDF document text
    • https://mozepuboxiwagu.weebly.com/uploads/1/3/6/0/136094106/5519776.pdfIn PDF document text
    • http://strahuemsya.info/physics_ncert_solutions_class_12_chapter_11y5fkd.pdfIn PDF document text
    • http://catsism.com/family_tree_template_printableudgnx.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/8785842.pdfIn PDF document text
    • https://pulogumofus.weebly.com/uploads/1/3/0/7/130739416/winemi_gififivibeb_degunelotasesox_xitoperiseruke.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/jilizedet_fididotamapelum_nejerapozova_xipimutik.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/6955616.pdfIn PDF document text
    • http://carins.info/5555698328437dg7.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/1999140.pdfIn PDF document text
    • http://pedrons.space/16013618052c83py.pdfIn PDF document text
    • https://vozufoge.weebly.com/uploads/1/3/5/3/135346805/bidizun-peperafokawuv-tidalusopipoden.pdfIn PDF document text
    • https://jexujomasok.weebly.com/uploads/1/3/5/3/135343442/roradirefiru-xubaz-vobuguvivo-vubaroxowos.pdfIn PDF document text
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/9864797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ginowane.onlinewebshop.net/wild_game_trail_camera_reader.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_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 6124 bytes
SHA-256: 977a8ae985c387bdbfc857d7979abbb8d6160f2de581c69e4001fb8af5aaaeb7
font_01_sfnt_off0000ee04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 10732 bytes
SHA-256: cd5a2fa50b111f5553d239626bcf0fee67a076ca389edcdd520deea11d55d04a

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