Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3da894dacb17ac6…

MALICIOUS

PDF

71.0 KB Created: 2020-12-17 09:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce074ed72c9aeea7d9f5d232fe1903e0 SHA-1: 1fe4d18ed910cb73c3b1395f183f5c8e2f55049a SHA-256: f3da894dacb17ac6748fad6ceea06005591efc508072f3ffc9e9b81e5bcb5150
156 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 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.
  • 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://traffine.ru/strik?utm_term=buy+anavar+pills PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8706a228e8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fc7a839c9a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_5fa93d06a78d6.pdfIn PDF document text
    • https://lefasibemaji.weebly.com/uploads/1/3/4/5/134589759/lutawenevori_gefut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8cb979ab42d.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/sowemibojev_nemavi_reguxumegen_towefek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2c0e99955c744b5478b1e/t/5fd142d49deafa3d82d15277/1607549652799/tupozixirisivedugunex.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5da01bda9c57a97e01dc8/t/5fce30e06f0099009e8eceeb/1607348448830/hot_wheels_gumball_3000_lamborghini_aventador.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/south_movie_video_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6d6cd3-c0f9-46d7-abc6-6630bf6d971c/6397304232.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf519018e72e5fdbce5745/1606373777718/12241336485.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72439f2297e36a9fcf3c7/t/5fd1449f13fdce15e7be7a32/1607550112338/pavusavelom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794cabc0-6fa5-4d37-84f8-ed2f1f8cda71/jisuvegagigemo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10afc403f5353fd968892/t/5fc1e2a57acac6192a056eb5/1606541989851/salt_and_sanctuary_drowned_censer.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/71523337771.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC438 5024 bytes
SHA-256: e268a166445e0aa202db17ed073db4f215fb6a9b0f760a7a6a0ce1cc13d3bdc8
font_01_sfnt_off0000d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56A 10216 bytes
SHA-256: be0a8b4564f04ba23671a26209ebfff9402fbf7f3e302ecc2a43c8d5a9fc3983
font_02_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 16180 bytes
SHA-256: 20aa7704523d1f11091dfe06c0bc083d45d293f00f57559894ca08e87abbbd9d

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