Malicious PDF — malware analysis report

Static analysis result for SHA-256 addf6e4cc99ce17e…

MALICIOUS

PDF

84.0 KB Created: 2021-03-16 04:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bdc7fe1e05bc8c86b0c347a1e09040d8 SHA-1: 008984dd662d419821348c5183fccb1bad1cd938 SHA-256: addf6e4cc99ce17edaa3b91757864316ec926f505bacedb21c1e0ce0351ef881
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The embedded URLs and the document's apparent purpose of acting as a lure indicate a phishing or scam attempt, likely using spearphishing as an initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=sister+act+pdf+score PDF link annotation
    • https://cdn.sqhk.co/talokelom/ZpghKhe/earn_to_die_1000.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/cxijjgz/melbits_world_playlink.pdfIn PDF document text
    • https://cdn.sqhk.co/pewovixosafu/gbfGMhj/cute_pink_wallpaper_hd_for_mobile.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/lameginubikojep.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/FgcHJif/legananokopizuzuxadowok.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/R0gdhbZ/juwuvuralamupufanimozagi.pdfIn PDF document text
    • http://gapojigewe.22web.org/potegafob.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/4g_lte_speed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_614af1a6d42e44e988d37c77adae5483.pdf?index=trueIn PDF document text
    • http://bozudob.epizy.com/baghouse_filter_working_principle.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/zomim.pdfIn PDF document text
    • http://sasoregasot.epizy.com/what_is_the_definition_of_comparison_and_contrast.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_5e554ec986ec46c4ad4301b630406ada.pdf?index=trueIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_00bdb60a38424db3b98bec6999d9ee40.pdf?index=trueIn PDF document text
    • http://vakewexapenox.epizy.com/chrome_android_notifications_api.pdfIn PDF document text
    • http://jokosen.atwebpages.com/ambiguous_sentences_in_english.pdfIn PDF document text
    • http://sofiveza.rf.gd/368945316.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_bf35c985584f4244b51b94ca9d28cb93.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_a139c1e3e4214564babaac4832f5e034.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_off000109bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BD 5220 bytes
SHA-256: 3fc97c28f82db891de162fd6f1cf7ddc9d96678dd8b1f621e78058556a8a5f11
font_01_sfnt_off00011b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 11700 bytes
SHA-256: 19485754f36b64905979cf17b20d72b6891068ad7c6f9fbd26fc9ed6e61a25d9

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