Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd9e4cc3e44fffe…

MALICIOUS

PDF

78.4 KB Created: 2020-11-27 15:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fe4a90b94fe2e815c73bce913378f45f SHA-1: 17f626c333692884efde2583622c77374229db5b SHA-256: 7dd9e4cc3e44fffe14523d46ca9c682b2e1fb3b890d3a0eab03cc637ae4082c8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential phishing or malware distribution URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links and the overall structure suggest this PDF is designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://traffset.ru/strik?utm_term=geometric+sequence+means+and+series+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493873/normal_5fbf23588de34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_5fbf21ce90299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f872cc7d9216.pdfIn PDF document text
    • https://virusogodunaf.weebly.com/uploads/1/3/4/7/134762125/979c2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5fbdfede643ae.pdfIn PDF document text
    • https://poraduke.weebly.com/uploads/1/3/4/3/134385775/xugigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f9af32806bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_5fa1257f0b97f.pdfIn PDF document text
    • https://jofowurifizowaj.weebly.com/uploads/1/3/4/6/134684387/382235.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/4d8c55.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://chandas.cakram.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15e3866-0ff1-4329-a860-05371fe5d6ee/kegorazaliwelatiratenapi.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/the_binding_of_isaac_rebirth_android_emulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84f68b6-69ab-44bb-a150-2654c928a3b5/53373940433.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/xejorig.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
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC256 4948 bytes
SHA-256: f2551a89894aac53ae3cc481f5733b5046e0fef44d7ba15d67c0d2784bd8c9a3
font_01_sfnt_off0000d4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 5460 bytes
SHA-256: 7e2fead34dd5217bd18dd3b392775dac01042e2e39b26d6ce4d1293b985e4741
font_02_sfnt_off0000e723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE723 10384 bytes
SHA-256: 54d7aad66c34661cec77f526cecf7405f8fef2552a200e4e2b59c28541dcc4df
font_03_sfnt_off00010ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 16072 bytes
SHA-256: c77622905d69f123c69e550cb8a6ad56f38b09fe512a90d62cd1bbabb7e7f1bd
font_04_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 4544 bytes
SHA-256: cb0a167ae4d671aa67d57750921a08e665360bac6e101b9c424237987a050f3e

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