Malicious PDF — malware analysis report

Static analysis result for SHA-256 357128b47ec2e35f…

MALICIOUS

PDF

58.6 KB Created: 2020-11-11 15:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6d5f3f75034f99f4ee4d1827edb99f7f SHA-1: 323ad42b7b051d9d3a115762bd3e53955105df40 SHA-256: 357128b47ec2e35fe5fe3362f8a0d1d033cefb285ef96e4889835870a2155981
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8253

Heuristics 5

  • 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
  • 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://traffine.ru/aws?utm_term=harby+junior+high+website PDF link annotation
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/vamepebopebof.pdfIn PDF document text
    • https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/kivapasejap.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/5a6f19fa768b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fa6cad49ef3d.pdfIn PDF document text
    • https://vedokaxo.weebly.com/uploads/1/3/4/5/134529556/tulomapimon_ziveginusix.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/dedigeta.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/f8e39f.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/1327688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd2c6fb-c539-4ff0-9796-c836846619c7/free_cincinnati_bell_white_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ab850d-bb33-4497-b9f5-383b90375192/rubik_s_snake_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2855777b-95c6-411b-914d-b8c14b318515/96310515813.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/ge_smoke_detector_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e7cc24-edac-4b41-bf39-cc45d9aa61e5/bewepagapajuxid.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/83448435366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7867df35-101a-4511-a79c-82572e6d9f5a/cherokee_inc._is_a_merchandiser_that_provided_the_following_information_12_000.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/who_invented_the_guitar_talk_box.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 5168 bytes
SHA-256: 7cbec033335637db31652612d7604c40b82f35e4671f5790293dc03154ff674d

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