Malicious PDF — malware analysis report

Static analysis result for SHA-256 d452453cfae2270e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-28 15:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b32c66aa60f979887f644001d1f06ff3 SHA-1: 13f5b9ffbb075ee1972db8b4960d6e3f06862885 SHA-256: d452453cfae2270ecb5fa1637d4053b840fceb81fb31b43f4b5c98a89847f336
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 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://crophysi.ru/wix?keyword=pubg+mobile+hackers+everywhere PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387815/normal_600a9fa56ec99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_605f9bd81930c.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/pusudafizojafo.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/32815989467.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/dumazirozuvamafa.pdfIn PDF document text
    • https://kufesivewafe.weebly.com/uploads/1/3/1/3/131384244/nofubuzuzef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464851/normal_6004cde65ef73.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/c9094993-9f4d-4896-9501-25698b13bcfb/weber_genesis_e-330_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe5e1e1-83b2-410b-8d7b-c3a086e0db63/hunter_src_plus_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/dvdvilla_bollywood_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d8597a-9973-47af-86e0-00e8dcc1783d/como_hacer_un_a_word_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0f772a-0c0d-4d04-a08f-c49ef5989c3a/bowuliweposeximig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1ed173-f1c1-4f19-9efd-944fd913f1fe/lajubaxole.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/kmsauto_office_2010_activator.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/2596184370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4390f80a-00e7-4cc8-a619-82b782f09505/83454494124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f534b2aa-d1dc-4ce3-a6e8-bd32eafb79ea/kewevawuwoberavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1575a5-8922-4795-9161-edd5abfce2e7/a_series_of_unfortunate_events_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f0611b-9348-486c-8d72-e5dfe92e7dab/ganavutiwapakem.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/tixipelukukorole.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_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5672 bytes
SHA-256: f1b51edc20edb674629913d7bde44815180288b9303ce841548ddbd5dd6eb3da
font_01_sfnt_off00010a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A55 11128 bytes
SHA-256: 3ee6a07897465df28d66ce6aaf6d0764cbe72dc399c1e515c7dd92485e748fec

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