Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7aa3dc6ce8a3ce2…

MALICIOUS

PDF

71.8 KB Created: 2021-01-01 10:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e4120985cf16a77e3b4d6032c79a3e2 SHA-1: 6601b76de95e3de522644161456d8d13da723543 SHA-256: b7aa3dc6ce8a3ce2aae646998741e1cb6db2d538ef686669db983636e2359856
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 0.9997

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://trafffe.ru/strik?utm_term=marketing+strategies+via+social+media PDF link annotation
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/zaponalolotopusuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_5fbab29f318fb.pdfIn PDF document text
    • https://suretazusidik.weebly.com/uploads/1/3/4/0/134012564/5287766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_5fd0ec1f03cca.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/lefemijip/pubg_hack_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/tom_richey_ap_euro_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/lafimujumetewuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/fofifam.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/92476511297.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/astable_multivibrator_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3615c0e-1c59-408c-b5e6-3082a5c7c0a2/33057686014.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/describe_the_financial_reporting_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/away_in_a_manger_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/23942025089.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/duwobijis.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/36729339008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950d448f-f4ba-4cdf-8e67-458ce2fe28a4/84473519818.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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 5388 bytes
SHA-256: 400af6b371a722c4a38704f78035e884efe72f0f45c5e84086c0be0d46433ba5
font_01_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 10856 bytes
SHA-256: 7b93e77a97f35503c2aaf6beef40eb284ad1e3109bf0327b729ee97ecc67b416

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