Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dd3b3cf35d0210…

MALICIOUS

PDF

76.8 KB Created: 2021-03-06 17:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5222e12578dbe81f1704207da457f2eb SHA-1: 8b64bc384faa3dcbf553be66dd87e57cff35abef SHA-256: 40dd3b3cf35d0210a3bbc4e7769a4456688c96bdb311e997f52e0b7413d30524
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a deceptive title and numerous embedded links, many of which point to disposable hosting or unknown domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are characteristic of phishing lures designed to redirect users to malicious sites.

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://bologen.ru/strik?utm_term=which+domain+is+best+for+data+science PDF link annotation
    • http://app-3null.com/falolevadaruvozobaxavit2zon6.pdfIn PDF document text
    • http://hookup154.space/guwavukijudapazilzy3un.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/xirixepo/46786741969.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/jibegusotepadadibiwi.pdfIn PDF document text
    • http://tepuvat.epizy.com/ias_puzzle_questions_with_answers_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8708f9c-885e-4a5f-93db-692364b7a4b3/29434754440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da348dd-49f0-4745-ac12-0c9a7120dbe4/the_professor_and_the_madman_netflix_review.pdfIn PDF document text
    • http://xijulazerajip.rf.gd/xuduna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1654e471-e12e-45e4-a1af-4f19ad24c675/64499540771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fbd1b6-3af0-4fbc-bad8-3e83098569c0/reglas_de_acentuacin_de_las_palabras_graves.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/guzaguropanireravoxobopan.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/nezev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e31b0d-cf2a-40dd-9ec6-e235079a0e1a/what_kind_of_yogurt_to_put_in_smoothies.pdfIn PDF document text
    • http://vukenorap.epizy.com/good_android_phones_under_25000_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d10172e-e9a0-4d05-9cae-bd2aa57d3b0c/chief_yeoman_eval_bullets.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/sevawanojijapojibop.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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5380 bytes
SHA-256: 84b4072f71881cd50399726109ab719f86aa5442125c4f9c0ec1b57073a5e97f
font_01_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 11040 bytes
SHA-256: a49509bf2e0dd7490fcb17e155e9805961e73c0a4b973b0f5e382d1e720788cc

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