Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75f4a5fd1dc43f9…

MALICIOUS

PDF

127.4 KB Created: 2021-03-20 07:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7c64b1d81b2cae4e7241839d12974851 SHA-1: 95971f0510c787c8f0fd76f77d1dd2696ef52cae SHA-256: e75f4a5fd1dc43f98ef23a63dcff3b7006f09c836539f4748361b3a583644b7c
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-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://maypoin.ru/strik?utm_term=based+on+the+descriptions+given+what+film+does+not+exemplify+the+concept+of+social+engineering PDF link annotation
    • https://bonawoxe.weebly.com/uploads/1/3/3/9/133986387/somerizaguzal_nelujekudije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413118/normal_5fe7d0385acc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_6022bc906ca8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475209/normal_60210abd58f2a.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/sedip_gefovifoga.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/312ea6be-ef03-41a6-8c52-ccfb93f68cd0/64659621626.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_6d78788db4b24f4c9f624ccf1bc57d86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/78945276263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be41c7c1-2e86-4b82-9b1e-6f636b95a93f/98358670735.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/52492717103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0548f51-27ba-4eeb-a402-3babfe215227/what_are_the_rules_of_cricket_darts.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/nisonar.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/fozoxujamitofedutewuno.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/98760916161.pdfIn PDF document text
    • https://d4a58959-25bc-41ae-a48c-99f47e3c4711.filesusr.com/ugd/4dab1e_915d10c570614e02a298f209b759048e.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_b535692ef50c48028856779a012be554.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0171c1-9564-4eb6-8ae4-4c6aed99147f/lumige.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/homophone_worksheet_4th_grade.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_cdeed0d9214b42b5807b1842ea7fc269.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/zovatusixuwewe.pdfIn PDF document text
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_f4171039416e4828aa7b780f7f2d797e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/xilujofopefesunavo.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_off0001b373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B373 5940 bytes
SHA-256: 2905947005c341bb36a5f44341c21b3faecc7bda5cbc0f55b6398b20006938ee
font_01_sfnt_off0001c7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A3 11528 bytes
SHA-256: 287b4d4ec47f227c0edba5d382b49b17ad7a48e885d46c6aa5aae1d5deefb80b

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