Malicious PDF — malware analysis report

Static analysis result for SHA-256 72990e16b6c791f5…

MALICIOUS

PDF

84.5 KB Created: 2021-04-06 08:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 86855975d2d09a443ac3a0d655fafeaa SHA-1: 6c04810b7b5b7e2760fb5fa8ba615267211d7317 SHA-256: 72990e16b6c791f511e792ff816aa8493538febc31eca0e9f335e61b00c7ac55
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF document flagged by multiple heuristics as malicious, including a payment redirection lure and ML classification. It contains numerous external URLs, with one pointing to 'fokemale.ru' which is associated with a keyword search, suggesting a phishing or scam attempt. The document's content, though heavily obfuscated, is described by heuristics as a 'Payment redirection / bank-detail change lure', indicating a likely attempt to trick users into compromising financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://fokemale.ru/wix?keyword=conic+sections+circles+worksheet+pdf PDF link annotation
    • http://opensoda.pro/17198478363o4qvz.pdfIn PDF document text
    • http://shopyou.online/how_do_you_troubleshoot_an_electric_golf_cart_motorjk8qx.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/2007_yfz_450_review.pdfIn PDF document text
    • http://registrat.space/how_to_unlock_radio_in_2007_chevy_impalatd5pt.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/gezapawuz.pdfIn PDF document text
    • http://christinaanddavid2019.com/27190993367sv48v.pdfIn PDF document text
    • http://fredo.bike/gituzevar8rae4.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/what_is_the_theme_of_first_they_came.pdfIn PDF document text
    • http://paxabak.mypressonline.com/2753349260.pdfIn PDF document text
    • http://getveran.site/dragonstar_guide_to_the_galaxyc2c6f.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/kofimiridafurideseb0yf7.pdfIn PDF document text
    • http://kifepivukog.iblogger.org/48060625794.pdfIn PDF document text
    • http://dragonflysagewellness.com/55466386862hcs4l.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/d9f99166-7b9f-4df2-b511-da363d847a1e/26277950412.pdfIn PDF document text
    • http://nurarodavokowe.epizy.com/fodilonodelorusoti.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_58c7997d0380458e8a5ed8cebd1b83b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/689d420e-caa8-4cac-98ee-ae03364d3b17/molow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bb10fa-0af5-4998-9eee-d9c804e273c0/what_carpet_cleaner_is_best_for_pet_urine.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/positive_comparative_superlative_adjectives_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15374d4a-2d61-4add-a2fc-1aad49b65d59/kill_team_40k.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_ce371ba5de9c4057a81e126a42bcbf69.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_11e8598263fa4a578dfd82f5aee73bcc.pdf?index=trueIn PDF document text
    • http://zatafefot.rf.gd/blynk_app_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2365ade2-6028-4fdd-a84b-1abdafe41af6/family_reunion_registration_form_template_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5092 bytes
SHA-256: dfd85117bc9b10318eda7619eab17b3406022903b8de205e3f3e9df512250225
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 11268 bytes
SHA-256: 26ee4cc234e6df59c700fa5e22b343082f58c2d8096624c32594f5af00bd2de8
font_02_sfnt_off00012eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEE 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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