Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3a3e718b3866aa…

MALICIOUS

PDF

75.6 KB Created: 2021-03-04 18:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e8287d24b762d94f3f13dfba21cf877a SHA-1: db9ec91a8c80e72ef7d46bf7a5daf5e1bdac72b3 SHA-256: 1e3a3e718b3866aa77f0071b10305ef36e43c05033adbcea76fedbf621ecae09
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to common technical queries, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=how+do+i+factory+reset+my+motorola+android+phone PDF link annotation
    • http://atlas-copco.su/vekumamewuludy7wg3.pdfIn PDF document text
    • http://yandex-dostav.ru/cyberpunk_wallpaper_for_pcbla4q.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/a37a4f7cf6d86c.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/what_is_the_main_purpose_of_partnership_deed.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/duwinu_fopolegurag.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/summoning_spirits_download.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/miguwitefudibekefi.pdfIn PDF document text
    • http://arendagg.xyz/76729570744ks0kn.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/7d8a69b1c05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_cceaa06008774862b545c2709c4f251b.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_1cd5ea178d7b4506b8c3e9baf46ca1d7.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_a1afc62cf970463ab87bee92ed36f647.pdf?index=trueIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_f05c13044d6544f5af71d4b33ee82e97.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_0c7bd655f01b42d8973c9a181d1d8721.pdf?index=trueIn PDF document text
    • http://bogalibamadom.myartsonline.com/jisux.pdfIn PDF document text
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_9acb7d949f6347b299522a136c2fc1f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jozaponi/85125532053.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/xonivawilokezigifegikurav.pdfIn PDF document text
    • https://70ab076f-8fb6-4ffc-bf07-23e8f970f277.filesusr.com/ugd/cac9e4_c435eda464ec41de8b787636e3fd1f6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/adobe_acrobat_x_pro_flatten.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/how_to_test_cranial_nerves_in_infants.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_f86e668cd64a4a41b587ea22cbf8b17d.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_48f6ea59eb004118953da3861a33dcff.pdf?index=trueIn 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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 5552 bytes
SHA-256: bfaae8066c78478a2e10f9fd8eb6c323235e36ba0e60c47645f7c6ee9f829436
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 9936 bytes
SHA-256: 4de3824fe14797d8f9f07dbeacef69dc546eb26f64c168b394e0f4fb6b3e8236