Malicious PDF — malware analysis report

Static analysis result for SHA-256 2726de37c25a13d9…

MALICIOUS

PDF

71.3 KB Created: 2021-01-20 05:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 01593ad177379c70a7f3ebf31991023f SHA-1: e9bcfc189880c8a52b7b3b6e0100753ddf8413c3 SHA-256: 2726de37c25a13d9c74a24373aadce0fd0e060fe387e3aa1134763465acbebe5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many hosted on disposable domains, and uses SEO-related keywords in URLs to attract victims. The document body is heavily obfuscated, but the presence of external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://seumenha.ru/123?utm_term=alabama+board+of+nursing+confirmation+number PDF link annotation
    • https://xifuvago.weebly.com/uploads/1/3/0/8/130813557/6150657.pdfIn PDF document text
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/6738582.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/jegiwurilolifimapira.pdfIn PDF document text
    • https://site-1171745.mozfiles.com/files/1171745/vatican_museum_guided_tour_tickets.pdfIn PDF document text
    • https://site-1178372.mozfiles.com/files/1178372/fomegaxetepoj.pdfIn PDF document text
    • https://site-1198654.mozfiles.com/files/1198654/sago_mini_trucks_and_diggers_download.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/dedunus.pdfIn PDF document text
    • http://juzajikadig.22web.org/overcoming_communication_barriers_in_schools.pdfIn PDF document text
    • http://foxinawolukomat.iblogger.org/free_messenger_lite_uptodown.pdfIn PDF document text
    • https://site-1175525.mozfiles.com/files/1175525/38537640258.pdfIn PDF document text
    • http://sokokusulamubi.22web.org/tourist_guide_book_design.pdfIn PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/busy_warszawa_biala_podlaska_garden_service.pdfIn PDF document text
    • https://site-1179802.mozfiles.com/files/1179802/zizuputudonewomin.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/poresi/credit_karma_credit_report_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/agar.io_hacks_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/pezebewovemaroxa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/dangote_flour_mills_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/little_sunshine_preschool_az.pdfIn PDF document text
    • http://fegarezitima.rf.gd/9320668739.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 5472 bytes
SHA-256: aa8599e64a5554ef2e2c12bca10e8e1231e0f634d5ee692c308354158d793f0e
font_01_sfnt_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 11548 bytes
SHA-256: 23c2c40a9ac44c327ac5b09f418d59e1971c5678c663267fc38b01000a5feb03

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