Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fa116e6e31a367…

MALICIOUS

PDF

82.7 KB Created: 2021-06-04 14:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2d6d5915a20d7f1b4431ae157fdff374 SHA-1: 4bef90ec92b5af0d58de9288b775d2182a3bd8a3 SHA-256: e7fa116e6e31a36736d3de00ecef6949485da0f04f13ded40d66ef1e4c3988b3
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 phishing or trojan threat. It contains an embedded URI pointing to 'https://philabc.ru/pbw?utm_term=hide+and+seek+alone+rules', which is likely part of a phishing campaign. The PDF also exhibits characteristics of a link farm on disposable hosting, further supporting its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/pbw?utm_term=hide+and+seek+alone+rules PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378160/normal_60018d1df1ee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_605fad8559b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_603b9b0a1a7bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_6023363a9755f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477367/normal_5fcc2ea54296e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_6020fcec9f675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_60484b3426adb.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/73903026-25f4-4cc1-b47b-d32f5caff0f8/how_to_start_a_senior_farewell_speech.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/w/file/fetch/144565281/will_wireless_charging_work_with_a_case.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/75094976271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa18cd19-532c-43de-9a6c-4e27ac5383ec/soal_aritmatika_sosial_smp_doc.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/f/88526242929.pdfIn PDF document text
    • http://rabopadob.pbworks.com/f/18403362942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f04c7c22-33bb-484c-a4dd-cbfb3b2fe64b/understanding_and_using_english_grammar_4th_edition.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144590778/asphalt_8_mod_apk_unlimited_money_and_tokens_ios.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414258/11836282807.pdfIn PDF document text
    • http://pebenuziwi.pbworks.com/f/zagoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d084cc82-328a-48a6-926e-cf5d088ad2da/were_spartans_the_best_warriors.pdfIn PDF document text
    • http://gonumutat.pbworks.com/f/sobenanimenawabojomoraje.pdfIn PDF document text
    • http://xozojonurom.pbworks.com/w/file/fetch/144555705/53659709012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee54328-30b1-4e6c-9b05-dc004f2ddff2/miniature_dachshund_cross_puppies_for_sale_uk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 6324 bytes
SHA-256: c8fbc2f7d0cd4a1774bcd1dae58d9c876fc05c8083539057fa3e9b4ef82837d6
font_01_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 4844 bytes
SHA-256: 9e876b666fa50c258c0681d13384b149b968cee9354894ed550e11921038ccec
font_02_sfnt_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 10464 bytes
SHA-256: 1777ff237e8ae229d1b6d1d972efba9c46b49d5b0aa324198cd623ea47292c22

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