Malicious PDF — malware analysis report

Static analysis result for SHA-256 f891ca0928c97ca4…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 16:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8d0c18c799160c1b5125b19cf8a2711 SHA-1: 57e314df1f405ced7acc7a5266c3ef7fde803cd7 SHA-256: f891ca0928c97ca46170d6ed828877f743feb2be65a618784a182290e9fc195e
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://dugedepap.ru/strik?utm_term=what+countries+does+north+korea+border PDF link annotation
    • https://cdn.sqhk.co/tobipamu/Pshgjdj/rofanotefe.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/hRhjjfl/xezupifaravolesubi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/ajefNbz/joxon.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/levozuli-jigebobimoj-xisat-salilanibav.pdfIn PDF document text
    • https://cdn.sqhk.co/noremixujor/hcibroG/dosupajufu.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/hdZhbF9/water_meter_reading_calculator_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/sufajezugi/gjihGJi/95691395777.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/bgcUT8C/video_status_download_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/fh1Cr5G/cute_animal_backgrounds_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/e8cEQme/xafibovur.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/jdijdhi/mountain_bike_shoes_spd.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/Lgjjgjb/paxisefagutadexisexugor.pdfIn PDF document text
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/4744752.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/dazuxujepov/58380531735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c4a72a-310b-468a-95f2-a72b13e8ce42/15108840562.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/30664483635.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/lulokasabiwolivelutidafen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3475e525-cd9e-425d-8fce-9e5bd7c84017/first_things_first_song_j_cole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836c9df5-bf51-4c22-9a2c-d568d9d5c891/lufijutafi.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_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 5212 bytes
SHA-256: 72e6575301da027a9d24050e1186f03b07a00bc0f381573e87a87b06a8f07583
font_01_sfnt_off0000fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 10972 bytes
SHA-256: 1b4550416ce86dd4c3396b7d0dd908e7aec95ffa5123d80ebe23c20cb8fed252

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