Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f751359ea34294…

MALICIOUS

PDF

73.6 KB Created: 2021-04-05 10:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79627bffea5d5e297837a176e26ed374 SHA-1: 50b94f5c6915abf242812b43077359a724a9a534 SHA-256: 54f751359ea342940b57ed5cd548352f844a3f3b9b73d62c4c2ad678bdee9863
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 0.9996

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://golowaki.ru/award?keyword=bawarchi+hyderabad+menu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454287/normal_60696f25795e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384822/normal_5ff175e8437f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476150/normal_6031d3ce440a4.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/wilidagone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_6062d38f6480a.pdfIn PDF document text
    • https://polatubogo.weebly.com/uploads/1/3/4/5/134598163/tajulejivemi_lixafomara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_60382f6029609.pdfIn PDF document text
    • https://jaxifojuw.weebly.com/uploads/1/3/5/3/135351184/kebuguj-dulupirato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_601bdd276af73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_60287178552da.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/ac791bf94bb9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_6054592d2d29a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476765/normal_6025f8d78c8a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fed9e9867a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_6051b886edeee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/93888742963.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/kadabemame.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/18784052832.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/95864397212.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/xafunax.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/membrane_structure_and_transport.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_off0000cb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB51 5568 bytes
SHA-256: 4ded0ef3b11387af3596a4e1c91d2cf85b4748008db89dd939265ba41a868c9b
font_01_sfnt_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 10504 bytes
SHA-256: 0d842c7a12c56789a076d05e09aac4552fc233e405cf63b9f8eba5f220c157b5
font_02_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

Open this report in the interactive analyzer, or submit your own file for analysis.