Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea3d98c6a16752a…

MALICIOUS

PDF

165.0 KB Created: 2021-03-07 16:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8d1c1e49a6acf6178cd6e1757a13ef54 SHA-1: 52b67d21f88cc16e42f1be2711fda83e382abe84 SHA-256: aea3d98c6a16752abf44df7d8d0a474e9a2e6d88cef6bd4318a48a2203d9909c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is classified as malicious, exhibiting characteristics of a phishing or link-farming attack. It contains numerous embedded URLs, many pointing to disposable hosting or unknown domains, designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to execute further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gimoguvi.ru/aws?utm_term=the+power+of+art+rembrandt+summary PDF link annotation
    • http://nemosixumeki.mypressonline.com/husqvarna_120_mark_ii_chainsaw_review.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/15562003461.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/32155283062.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/civil_engineering_firms_in_atlanta_ga.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/77541344530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_b8fdb915ef75424981202003c8b93f23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/688effd3-31c1-4ae8-bd84-3c70452f3345/vurajudozapebobirupariwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc8a86b-6d01-4ce4-a210-6074ddc48081/coleman_generator_5000_carburetor_adjustment.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/philips_norelco_bodygroom_series_7000_canada.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_b19f1430986c4af79c966c4fd03493dd.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_7573ad581d79427ab636b6739665bc05.pdf?index=trueIn PDF document text
    • http://pabotojixupi.atwebpages.com/15935729629.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/definisi_platform_adalah.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/sasofumowotekikuvanomeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e97ce04-1ae0-4921-b7ea-68e5376ce754/jejarijonepikojevofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbb6166-de6d-43c6-9830-65121ba27226/princess_diaries_2.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_735b313f3209497e802884847ad1cb1a.pdf?index=trueIn PDF document text
    • http://kubowulurarekij.myartsonline.com/how_much_does_a_new_bobcat_cost.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/22885436838.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/mexidupepapasu.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/bupeputupewavokatoreriro.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_01279135375249dcb8da79a13d51894d.pdf?index=trueIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_do_you_charge_a_ego_t_vape_pen.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002689f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2689F 18392 bytes
SHA-256: 8ba2473fe5285d9be55baca7b1a80f4859cfe9286f6861f78ff64483c5ffe139
font_00_sfnt_off00022926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22926 5532 bytes
SHA-256: ce5f96e6bc3b4cca7b187c6e10cb05247e40af297906a45d773b5683b076eb52
font_01_sfnt_off00023bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BD9 14288 bytes
SHA-256: 9d1a408bb44eac05a7a8cd188a3c9a46306bc8e14073754297f191b35bbf644f