Malicious PDF — malware analysis report

Static analysis result for SHA-256 5724ce34d07a7a0d…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 18:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a4aba0c49dc3632919ca8c4737aa7c4 SHA-1: 1011471f063177e864e3f781fa93e7e85cc09c09 SHA-256: 5724ce34d07a7a0d0180c9d5fa15aa5a9dc1e1644267d3181adcbda63d91912d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=pak+navy+jobs+2020+advertisement PDF link annotation
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/zogajasivimileg_fetoratudej_jigafamalod.pdfIn PDF document text
    • http://dabobez.22web.org/zalerulumilomefure.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/6fe2c6ac.pdfIn PDF document text
    • http://wamabivunufoteg.medianewsonline.com/spiritual_breakthrough_prayers.pdfIn PDF document text
    • http://conicppjry.bid/dewalt_pressure_washer_manual_dxpw3425wrlds.pdfIn PDF document text
    • https://wixuzezokanozav.weebly.com/uploads/1/3/4/6/134663812/modarerogomizeraduja.pdfIn PDF document text
    • https://bupebilonozopi.weebly.com/uploads/1/3/4/8/134861312/ae104e1.pdfIn PDF document text
    • http://relodifalixogo.scienceontheweb.net/geometrical_optics_free_download.pdfIn PDF document text
    • http://mazisim.mywebcommunity.org/morphology_and_cytology_of_bacteria.pdfIn PDF document text
    • http://handler-autoscout24.com/96399299746ppkbb.pdfIn PDF document text
    • https://sewokowoxukipa.weebly.com/uploads/1/3/4/8/134846336/tubanivu.pdfIn PDF document text
    • http://podeves.xyz/mohenjo_daro_full_movie_downloadzgb99.pdfIn PDF document text
    • http://jodazok.22web.org/introduction_to_systematic_theology_louis_berkhof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://besajepe.epizy.com/49493201423.pdfIn PDF document text
    • http://noroved.myartsonline.com/84900036717.pdfIn PDF document text
    • http://zuvaxazalafes.epizy.com/fejosodumajavorax.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/xanamipoj.pdfIn PDF document text
    • http://sukuvafeliji.epizy.com/97784597026.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/bazufiminodukikexejex.pdfIn PDF document text
    • http://jijulek.rf.gd/tactics_for_listening_third_edition_download.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_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 5656 bytes
SHA-256: 41df1d4d4814ee631ab942bd4389fadd2da7b058b412d6ddaf18bb3cfdda5b67
font_01_sfnt_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 11552 bytes
SHA-256: 32fea1f1839e9fc8929310cc3ed05d36eaa4183e7c60193db31967ee7bbd5492