Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08819cf59f2c7ea…

MALICIOUS

PDF

77.8 KB Created: 2021-03-11 23:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bffdb45398d5cb09b8c0e7aa6ea43fab SHA-1: 5f03978f480da0cb3ce232b4a99e25c41bb13299 SHA-256: f08819cf59f2c7ea0110340f265da972b1743bb77b9389e92c559bd947dfd388
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://midufefew.ru/award?keyword=article+critique+example+apa+pdf PDF link annotation
    • http://afracheat1.xyz/kezepesotupewilugd4xqh.pdfIn PDF document text
    • https://tonosunakimedu.weebly.com/uploads/1/3/4/5/134584607/926dd2.pdfIn PDF document text
    • http://akfb.online/lenovo_thinkpad_t490_docking_station826ck.pdfIn PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/larepafipitupiri.pdfIn PDF document text
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/8066e32b288.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_ac76615e10cb4b66bae2981cf5747f60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/17205962142.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/peromuwefirinedam.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_a4f9d11da7c1488da3fb494a3962c457.pdf?index=trueIn PDF document text
    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_d9b008e8089741ac83f66805bff46333.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/ubqari_magazine_free.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_eeb2f1758eeb45b785382b8211f78f1d.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_09afd6de4f1d42c4ae07dba2d0c6bbc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88258381-225b-403b-8c4b-cd132f40c3f6/pavosupakakex.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_735fd1d195c749898d6c0d3af6ad1f17.pdf?index=trueIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_273ab48affde490da7ebf778affb13de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/48496941733.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_dcd7387fe72b4b8bb8b2b33efa1df058.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea58417-7c2b-44e8-a075-bb5b0b560a34/cuisinart_airfryer_toaster_oven_recipe_book.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_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 5308 bytes
SHA-256: 0baaa01832c3899f4fffa1e1f3c3de6bc7d21a4aead2233fa169a09e65861c4e
font_01_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 10240 bytes
SHA-256: c80c41461e60b93eccbbb17af9aa30bd7e21263e6dfd2ad41ab809b8470a8a54

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