Malicious PDF — malware analysis report

Static analysis result for SHA-256 709a175186aaad1d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-08 22:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7d28d0c2cf208b398e38c597234ee2b2 SHA-1: b2c29b3c1db9852386965ad3b7b041d1b8243fdc SHA-256: 709a175186aaad1d98c9fdb8f409639099648594079b395ff8822c357b6881c7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple external URLs, with one specifically identified as a lure for a 'webarchive to pdf converter'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://resalured.ru/123?utm_term=webarchive+to+pdf+converter PDF link annotation
    • https://zufojemesegogof.weebly.com/uploads/1/3/4/7/134753559/a7eb9a7e4.pdfIn PDF document text
    • https://zavetogodafewer.weebly.com/uploads/1/3/4/7/134709275/8367711.pdfIn PDF document text
    • http://biwumani.mywebcommunity.org/best_traditional_african_music.pdfIn PDF document text
    • https://natutiwuv.weebly.com/uploads/1/3/6/0/136019317/5a452f13e.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/dusagusopaturu.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/wozurofarikikugapugopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bc5d5878-7fc8-4b9f-a3e6-8b1a1bd4f47a.filesusr.com/ugd/3835dd_ef4ae4f5a3b84b39880c0e86ac8b67c9.pdf?index=trueIn PDF document text
    • http://xojudemavu.onlinewebshop.net/what_would_cause_the_transmission_not_to_engage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a265bf3-3331-47cd-98e9-42bae4a98660/how_to_use_fonts_on_cricut_joy_infusible_ink.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/sonic_all_stars_racing_transformed_characters_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/xexunuvivemigapono.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/the_oxygen_thief_audiobook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d32200b-4fe7-4e9c-8bbf-8af2ff5c4b47/dosulipat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d417993f-84a6-41cc-bd19-8d660b236000/54234948940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1676e1-4b97-4e40-af5a-dc8442f7542c/what_is_ieee_802.15.3.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_73a78a8579004a1bb672058ed2efc09b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/esc_2019_lipid_guidelines_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/31852358705.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 5032 bytes
SHA-256: 58b0c3ec6843e4cd2553d312d9e7bfde0f8f24f838921307f277f2bf0b130a93
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 10908 bytes
SHA-256: 2ef29c7cbf2c28c7e8005412b4bc1f1d9381f46b26a3da69c60ea62716872641
font_02_sfnt_off00011f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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