Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04d958f7167d2f1…

MALICIOUS

PDF

82.0 KB Created: 2021-03-20 09:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e9fbf38d8b2338134630a9875b738ac SHA-1: 518979f73001a8df7ab9f5f75ad5392e6928e73c SHA-256: a04d958f7167d2f1d5e73f5a8d65240cf85c012157df75a38ac3cecb47fd09d8
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/award?keyword=pdf+to+jpg+converter+software+free+download+for+windows+7 PDF link annotation
    • http://memiwuv.mygamesonline.org/mastering_unix_shell_scripting.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_astrological_sign_is_november_22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_603d471540e74.pdfIn PDF document text
    • http://yourdesk.website/terjemahan_kitab_al_bayanttbqp.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/dGhfjgo/1637947285.pdfIn PDF document text
    • http://usacreditcheck.info/bella_4_slice_rotating_black_belgian_waffle_maker_instructions8wqen.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/just_one_day_book_free_download.pdfIn PDF document text
    • http://instas.site/love_story_movies_list_in_tamilvsydo.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/i2mP2hj/zombie_fun_run_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_603c10106602f.pdfIn PDF document text
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/dogobavil_munorodipux.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/kesubegirisa_duxirimovo.pdfIn PDF document text
    • https://xalokelunubame.weebly.com/uploads/1/3/1/1/131163690/da54280f000cf.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/8f0e3b4bb1a189a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480598/normal_5fe2aeeadb094.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://s3.amazonaws.com/piwanisaj/41658757523.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/sony_alpha_a6500_price_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/notoramal.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/chhota_bheem_kung_fu_dhamaka_trailer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 5420 bytes
SHA-256: 21426d084c6935cbea266cb8276cb1a12b7ee9876e1b5a173e60b2c408c7215d
font_01_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 10568 bytes
SHA-256: 466f2c09577b989cb2fb48aa677fca27ca2354debd4bf80c5f7ca73063a62929
font_02_sfnt_off00012bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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