Malicious PDF — malware analysis report

Static analysis result for SHA-256 870180af498b28d3…

MALICIOUS

PDF

79.5 KB Created: 2021-02-16 04:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b200260888c721a2b3afedb1fe3115d SHA-1: d49df882c51e0a10187f32b5322bd905b66bbc00 SHA-256: 870180af498b28d34f6b07667b5195eb5fdfbc559f489f4398cafc15920e3c29
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, including one pointing to 'seumenha.ru' which appears to be a keyword-based redirector, and another to 'sendgrid-de.com' which is flagged as a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'Gw2 artificing crafting guide', likely to entice users to click the malicious links.

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 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.
  • 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://seumenha.ru/wix?keyword=gw2+artificing+crafting+guide PDF link annotation
    • http://sendgrid-de.com/happy_birthday_wishes_imagespr4ho.pdfIn PDF document text
    • http://unlockdeals.shop/discord_colored_text_with_code_markup_guidevmvuo.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/9097199.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/raxapibomudireze.pdfIn PDF document text
    • http://wopedejani.iblogger.org/bigerojajogulezirakoseb.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/nomao_camera_application_free_for_android8dj0k.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/9455097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://babevuzax.epizy.com/charity_engine_desktop_free.pdfIn PDF document text
    • http://jimeroxivekafos.epizy.com/13230644250.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/fepolazoraba.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/cnet_s_mac_antivirus.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/xakepofojasalewizuzal.pdfIn PDF document text
    • http://dabemekos.epizy.com/video_converter_android_terbaik_2018.pdfIn PDF document text
    • http://fukokikedusej.epizy.com/40962546604.pdfIn PDF document text
    • http://waxedejav.epizy.com/fepokapojazamozit.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/autonomous_car_project.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_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 5236 bytes
SHA-256: 147bdf4bb1d3ac09fe04d998fd62c3f266564acad9af5df36fa5d4d7208974de
font_01_sfnt_off0001044d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 14692 bytes
SHA-256: b6ea490e8c8f8ffad9cc17e608cc0dfd88752e8754640b6c98873e35dc1691c8

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