Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb326d6a6a1f0ec…

MALICIOUS

PDF

79.4 KB Created: 2021-04-24 07:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7504957b8b87ba4e4573c9d9ff92e0f0 SHA-1: 5eff561ac9fb74b95d4e49574257e1ea12e4a01c SHA-256: ecb326d6a6a1f0ec4190413c79ee08f2e3437957859b7849a36e645b5f938bd1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'digital photography magazines usa', suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=digital+photography+magazines+usa PDF link annotation
    • http://specrazreshenie.com/89506190867ovwor.pdfIn PDF document text
    • http://amsidisi.xyz/universal_audio_apollo_twin_solo_usbbgltl.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/tinkle_comic_books.pdfIn PDF document text
    • https://nimidakotogala.weebly.com/uploads/1/3/0/8/130874585/a02dfc13d.pdfIn PDF document text
    • http://lnstagram-helping.live/how_to_reset_flip_video_camerais9mt.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://lelunoforonu.weebly.com/uploads/1/3/1/6/131606056/tarejizug.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/vunosifurajunuduroz.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/2122651.pdfIn PDF document text
    • http://lestyprin.online/uniden_homepatrol_2_gps_antennarumjp.pdfIn PDF document text
    • https://joxetoxuluf.weebly.com/uploads/1/3/4/3/134391367/tapewimowele-matezumo-lakisujovubox-tuwujamibiritiz.pdfIn PDF document text
    • http://storedubai.shop/stirling_city_library_blazer5x48.pdfIn PDF document text
    • http://mugedly.xyz/migulopimrj0i5.pdfIn PDF document text
    • http://mantenancie.com/proform_xp_580_treadmill_for_sale936o2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7faed3fc-99ff-4037-9b9d-869804da9a81/what_are_the_scales_of_measurement_in_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbf5766-9583-4cf4-a8c4-40199cceded4/38466524312.pdfIn PDF document text
    • http://remurojax.rf.gd/grade_4_go_math_practice_book.pdfIn PDF document text
    • http://kapejuw.epizy.com/nigawogutuxinetowumef.pdfIn PDF document text
    • http://gazisemodab.epizy.com/56067527425.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/gilli_bambaram_goli_full_movie.pdfIn PDF document text
    • http://bakutogigu.rf.gd/riwugexo.pdfIn PDF document text
    • http://retuguru.epizy.com/battery_saver_java_app.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_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5384 bytes
SHA-256: 952b1afe09d4233d64b12ce327c60aefd97f52e983b585724284cf76aed1cdee
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 11080 bytes
SHA-256: 2cec1a3633be76e72080e2dc1a0aa0fe74ee9bc4b70caf374509f6fb05d7ec1a

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