Malicious PDF — malware analysis report

Static analysis result for SHA-256 f497df52e53d4a56…

MALICIOUS

PDF

71.4 KB Created: 2021-03-20 04:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce2841c285ea744730b87ef8e48f6cbc SHA-1: 532e6d1f1cb83810efe0583bbc88cfbe703d1ea5 SHA-256: f497df52e53d4a5698dff436ddea281d3d73dc08faa61ad877a7aece58084c8b
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=gcse+biology+revision+booklet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377935/normal_5ffe8462ea922.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/why_do_my_teeth_look_whiter_in_pictures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5ff38f8fa9be6.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/ijqjgjb/lightroom_presets_tutorial_pinterest.pdfIn PDF document text
    • http://milanomoda-italy.website/4396972058036la3.pdfIn PDF document text
    • http://dumigegin.medianewsonline.com/66194142730.pdfIn PDF document text
    • http://wordwild-store.com/1986_yamaha_moto_4_specsbaayw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368221/normal_60077a5e2d865.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/qualities_of_a_good_teacher_research.pdfIn PDF document text
    • http://jnatural.space/bagiguwujawexulixebe7ciz0.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/how_to_do_a_scalp_cleanse.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/jhg4hf4/laridesokasabarowal.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/advanced_english_in_use_2_eso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_604048f8cf7cf.pdfIn PDF document text
    • http://top-salez.site/bekerixi6eum.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/how_to_eat_fried_worms_movie_rating.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://uploads.strikinglycdn.com/files/aaf96d08-01c5-4572-b6c1-7537b3f65f42/70103502260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e755bae3-1282-49ce-8411-7b0dbedc5c85/jetafojovubos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9035f1-308d-4ce5-a0fc-4bef2c6f3c40/28694164051.pdfIn PDF document text
    • http://soxarigur.myartsonline.com/pupazunogaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc64c494-b7f9-48fc-9272-e5006dbc42df/evh_5150_iii_50_watt_review.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_off0000c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86F 5300 bytes
SHA-256: ee690402b5b24433b1e04bfd0a632216236534a128815bf908ccc8581ccebb44
font_01_sfnt_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 11172 bytes
SHA-256: ea2fd46c68d990832d6c61725c9e0341fc5f2dd3581786743056579b2b3b4672
font_02_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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