Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3e2ae90c160309…

MALICIOUS

PDF

73.7 KB Created: 2021-03-31 16:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4951c029824404964df4fd22791ee6ee SHA-1: 0a3279fa4acf832121c205655e1746668c576c0d SHA-256: aa3e2ae90c160309249e7a7f706297038c899ca6e66281bbeb91145a803ee699
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, including one pointing to 'zajinet.ru' and another to 'butalinonoruma.scienceontheweb.net', which are likely used to redirect users to phishing or malware hosting sites. The document body, though heavily obfuscated, suggests a lure related to 'aspirations', aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=aspiration+precautions+handout+pdf PDF link annotation
    • http://butalinonoruma.scienceontheweb.net/gukadatanivorobem.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/JXjapHg/zirimosovofaku.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/derisadorobunul.pdfIn PDF document text
    • http://xikapajami.mypressonline.com/boziwin.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/nGfRWwA/rawig.pdfIn PDF document text
    • https://cdn.sqhk.co/jiloduvunilu/idjihff/bowflex_power_pro_xtl_home_gym_manual.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/58511865180.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/12708782438.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/jirupotesipe.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/fd8d70d9-4f0a-4f24-9ad1-17e3f320b11f/72729814058.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/87122489054.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/cyclone_tracker_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/chhattisgarhi_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/what_affects_population_diversity_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7682178-d5c9-49f8-8c99-794752054801/lejezugitagim.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/the_ballad_of_the_sad_cafe_play.pdfIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_9654d94a7ae54357a9c84fcd17202cd0.pdf?index=trueIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_2edf57d9a96e4e9c905e3ec7c4eb063e.pdf?index=trueIn PDF document text
    • http://madigekole.onlinewebshop.net/85892934377.pdfIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/76340464962.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_ea397917dce14515a3731d8889e2fe21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6537d39-b292-43f5-acb4-21b9e12873d4/netgear_prosafe_jgs524e_manual.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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 5200 bytes
SHA-256: a2bc079da6d0fbb25e1e031fd81b67adb56a060a4c23af882512371252a62473
font_01_sfnt_off0000f46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 11044 bytes
SHA-256: 7031e7901d31bd1a2775114b5316a767b640d15b1055cf61a20a151657465719

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