Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d48d2e925d27017…

MALICIOUS

PDF

74.2 KB Created: 2021-04-02 05:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ebf44c70e2ad16623847c172f56cc9fc SHA-1: 2515dcf528764df27ba34add3c6cdf71d02afbcb SHA-256: 4d48d2e925d2701761929f288a3f9aacf7f6cba0cb88062cc8aaeed58b9d5f71
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to technical documents, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=centrifugal+blower+design+calculation+pdf PDF link annotation
    • http://fakaluwu.scienceontheweb.net/ielts_writing_task_1_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/fsgmJia/tipurevanelajedodonitinok.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/can_you_replace_a_verizon_router_with_your_own.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/FDgf3jh/notakevuvivuxi.pdfIn PDF document text
    • http://shishkin-seed.xyz/lapuwuwy29xk.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/hbmhegg/amazon_cloud_drive_storage_pricing.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/EhbKjbT/2020_election_ballot_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/Agjjd8g/16866750758.pdfIn PDF document text
    • http://item-get.top/how_to_setup_comcast_xfinity_cable_boxzspfk.pdfIn PDF document text
    • http://kolomata.ru/how_to_clean_a_black_and_decker_belgian_waffle_makerhdrxz.pdfIn PDF document text
    • http://bilet-pdd.site/51760940538aseh8.pdfIn PDF document text
    • http://helplnstagramoffice.com/79926242499yiooa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://simipibenafar.epizy.com/bozim.pdfIn PDF document text
    • http://zexisudotelil.rf.gd/office_365_two_factor_authentication_guide.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/11110770779.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/benefits_administrator_job_description_template.pdfIn PDF document text
    • http://guxasimedoki.epizy.com/likagojeji.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/jorge_luis_borges_sus_obras_mas_destacadas.pdfIn PDF document text
    • http://dejexek.epizy.com/bible_quiz_deuteronomy.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/nejixisipon.pdfIn PDF document text
    • http://rawegutidum.onlinewebshop.net/84398035193.pdfIn PDF document text
    • http://tedizixulore.epizy.com/54426776252.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/cardiopulmonary_assessment_physiotherapy.pdfIn PDF document text
    • http://pazatirademe.rf.gd/grow_castle_starter_guide.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_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 5460 bytes
SHA-256: ee2e43966cde58ce321e531fd4aab7cc62a53c3092cf46906d5f54f70daab0d6
font_01_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 10688 bytes
SHA-256: bce46ad489aea0c8146d927632138a4b7bdbf9b60ba0397ba2cd9ebb17ba2e36

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