Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abe8e7c85e5da47…

MALICIOUS

PDF

70.6 KB Created: 2021-03-28 18:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9cc6fa3492506ba15bea079d143cee1f SHA-1: ab744f5055bc55cc88959feed89dc8817d0a0a0a SHA-256: 7abe8e7c85e5da472cdb2ab8638599e7265830e3863afd5205a2d7e6486f181c
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 0.9997

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://jottigo.ru/123?utm_term=conjunctions+exercises+worksheets+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490736/normal_604b88edba7a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5ffcc96f41b95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472783/normal_5ff03f9e5e082.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/EOWjchg/kidijobixajut.pdfIn PDF document text
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/xanivilaxefis_jukafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_60347160b3bd0.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/uhcjegh/57744199596.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/68igzib/caption_side_property_in_css.pdfIn PDF document text
    • https://cdn.sqhk.co/goxupolofodi/icIidZD/housing_finance_sector_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408586/normal_5fcf8558e3626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_6028f0d348236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_604942e3e2d48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5fcc1ab70ef77.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/2960287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_603973a06d26a.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/hidjam8/vuxowakumalezi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405945/normal_5fe0a68161f60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_5e084d68f1664e2a8e9897c2f6035939.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_ba64665b88584fc2a9d5edaf0bdec35e.pdf?index=trueIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_08b5517395e94e3580d0609361a9db5b.pdf?index=trueIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_91729100f1b54c18b00ca1089157302c.pdf?index=trueIn 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_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 5060 bytes
SHA-256: ce0b0642518c853b761e7b371b0204012f1c4801918cb72c66609ce4db2e77a0
font_01_sfnt_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 10144 bytes
SHA-256: 649520527422002b551b138433377385fbd2d75f06811775582af5dcb4f3e3a3

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