Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4244b27dfcb0577…

MALICIOUS

PDF

69.1 KB Created: 2021-03-03 00:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 39c17bf82d969d64d3390eae7e54e17f SHA-1: 934a2f4c501befd6fe5e760335a55aaf5a4a6167 SHA-256: a4244b27dfcb0577340deddd7389d99af8e8bfa989493860f0db96ea2a69ae3d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming scheme. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/123?utm_term=how+to+install+dishwasher+with+side+mounts PDF link annotation
    • https://cdn.sqhk.co/lakivasulis/qhfRjfu/dragalia_lost_kai_yan_twitter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_6033be9f5fca1.pdfIn PDF document text
    • https://cdn.sqhk.co/padumaxifop/d5lfUje/ftdi_diet_meal_plan.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/how_to_use_linking_words_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/ikThFig/68884862141.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/womafutegufajozixegiduxox.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/lugerikuvefomiselilogep.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/21970496361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_6024c0a153ba4.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/the_shack_restaurant_okc_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/jfgdPjh/zudifizikusevatopi.pdfIn PDF document text
    • http://xasujaru.22web.org/destruction_warlock_guide_pvp.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/marofedagesagirogolak.pdfIn PDF document text
    • https://cdn.sqhk.co/rogolafu/czyjeja/gartner_erp_magic_quadrant_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/ahcgihh/manly_wallpapers_for_samsung.pdfIn PDF document text
    • https://cdn.sqhk.co/bedipidis/chiIQje/paradise_island_bahamas_weather_in_december.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxogafu/dnbhhgi/you_are_god_alone_william_mcdowell.pdfIn PDF document text
    • http://kifavofo.22web.org/50647662463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokesakogo.onlinewebshop.net/generac_4000exl_air_filter.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/xatifajo.pdfIn PDF document text
    • http://wikatamuk.rf.gd/transparent_navigation_bar_android_8.pdfIn PDF document text
    • http://najorenowodume.epizy.com/clase_osteichthyes.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_off0000d3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B2 5120 bytes
SHA-256: 592ee521df7d680a1d03fe4753c600b07f230a763df82f461578be953dac29fc
font_01_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 9928 bytes
SHA-256: d0af1db1aca1eb2e67c5c41dbef10ef01ad5c9946f2bbae455c7320c933f51dc

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