Malicious PDF — malware analysis report

Static analysis result for SHA-256 822f68b1791fa1d8…

MALICIOUS

PDF

77.6 KB Created: 2021-03-01 03:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 94fa8b55ffc2d3115a5489357d4651fc SHA-1: 6022d6665a3e8afa2a3b291d91343c2a94da8308 SHA-256: 822f68b1791fa1d8eb652664418f5c3df784b996c858bf0211d933e417100aa3
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be a lure, possibly related to technical support or troubleshooting, to encourage users to click on the embedded links. No scripts were extracted, but the presence of many links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=dynatrap+xl+troubleshooting In PDF document text
    • http://lodomujimujug.mywebcommunity.org/kapodip.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/45275152416.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/52990136733.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/vivovutovarigo_maboru.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/xemarox.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/wanafedepetewavi.pdfIn PDF document text
    • http://ferebamof.22web.org/1766496107.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/wobipiwim.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/67282368666.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/fb6a1c537b3f3.pdfIn PDF document text
    • https://mitezexevas.weebly.com/uploads/1/3/4/5/134525922/wuripekafo.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/golaretedupofaga.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/can_you_day_trade_stocks_on_robinhood.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/tabla_periodica_elementos_metales.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rojanesifilagu.myartsonline.com/58259049242.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/40157045075.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/femirud.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/dedurijazafisop.pdfIn PDF document text
    • http://vazorilumi.epizy.com/sample_magazine_cover_template.pdfIn PDF document text
    • http://kegepedefaripi.epizy.com/staff_availability_form_template.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_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 5392 bytes
SHA-256: a7cde6a7ae35da11e951956f599f66d3fb58f1d884a4db327d73f16ccb71a655
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 13648 bytes
SHA-256: af1590e36fc06c7df0b3745cda5eedd63d876acadd9181fb9f6bf3aa9c213dbd

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