Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc965c9e86eef8e…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 11:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e02425947e0c5e13da1e19d9d0b2334c SHA-1: 2bdd442bfdc4ab505037666f620a6c9f28ca10ef SHA-256: 5fc965c9e86eef8e6eb092ad0c8673bd76daef233fd919059ccc271fcbcfac49
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://ponafet.ru/award?keyword=binomial+distribution+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/mitukutowum/dsNZf1C/830738621.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/ihOgehf/dapawopibavidizunuso.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/pezav.pdfIn PDF document text
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/veliba.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/nowogirusuwot-wixodag-jupeta-dukonikabire.pdfIn PDF document text
    • http://manaluw.iblogger.org/nomixopumimexaxisoruri.pdfIn PDF document text
    • https://cdn.sqhk.co/xelibini/jeXKxhi/65643649569.pdfIn PDF document text
    • https://bomefojidog.weebly.com/uploads/1/3/2/6/132695402/7417010.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/Uy1gdic/synthesia_alternative_linux.pdfIn PDF document text
    • https://lakiliwurig.weebly.com/uploads/1/3/6/0/136089988/xepebavototuxi.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/nimukajupu.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/cd16a08a0.pdfIn PDF document text
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/9118476.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hhjgchd/colors_for_instagram_profile_picture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/zodixevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f357df1-6082-4834-9c41-7c40b60420a6/how_to_turn_off_aprilaire_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd9722d-ca68-4ecf-b88c-e9549d2576ff/one_punch_man_garou_x_reader_angst.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc522e4-4dd3-4123-87b7-9803a6f08a3d/methodist_hymn_book_app.pdfIn PDF document text
    • http://meduzifovum.epizy.com/31121501077.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/4408779958.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/update_google_chrome_android.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_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 5376 bytes
SHA-256: 04715ba650c058d7c3593fe0cfba975d8b19d777f79cc7c678785edfc331902c
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 11792 bytes
SHA-256: 1fff90b257d5d63c5bf2b3de1c06e8cbbe33735c582f8122840c2fd3d393a696

Open this report in the interactive analyzer, or submit your own file for analysis.