Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f14735873b90e68…

MALICIOUS

PDF

85.4 KB Created: 2021-03-20 00:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 480ea3883b4ad919c1ca80bc474e5aa2 SHA-1: a43af9ea54f801b5d9e046daef4b8f850cbafb5f SHA-256: 1f14735873b90e68708053199c774bec8c0a4dfd4146f28e854e8da4f20dd156
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being https://jumiwimov.ru/award?keyword=perimeter+and+area+of+rectangles+worksheet+pdf, suggesting a lure to a malicious site. The PDF structure and embedded links indicate it's designed to redirect users, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/award?keyword=perimeter+and+area+of+rectangles+worksheet+pdf PDF link annotation
    • http://midimox.getenjoyment.net/importance_of_civic_engagement.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/dell_u2410_audio_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/6Shdw7T/nesugumusodipazowig.pdfIn PDF document text
    • http://gosofimasuwemig.iblogger.org/7521376422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_6046f744c35c6.pdfIn PDF document text
    • http://duzegipim.22web.org/78219225949.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/jd8hhjc/kafokefozuxafigebofi.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/abbyy_transformer_mac_os_x.pdfIn PDF document text
    • http://zaranes.getenjoyment.net/prentice_hall_algebra_2_textbook.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/kevemivanuvofadokuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/ezyhjCF/buzzer_beater_basketball_hoop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_600da76cb7fce.pdfIn PDF document text
    • http://nonimejusujajo.22web.org/my_talking_angela_game_hack_mod.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/plantronics_voyager_8200_uc_headset.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/bljdf3T/motor_vehicle_near_me_now.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ijeWFhc/amaze_translation_in_spanish.pdfIn PDF document text
    • http://toxedajenoxin.66ghz.com/52075616228.pdfIn PDF document text
    • http://zarujosusaxom.22web.org/wixabokef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poberebom.epizy.com/xukupugaxogirilaradi.pdfIn PDF document text
    • http://rasiwimuweb.epizy.com/advertising_ppt_templates_free.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/zovewufa.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/913889124.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/vagetewafu.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_off0000f7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B4 5724 bytes
SHA-256: ac3e2e92123b6fa254fe54544edc7442026911613a0181366a13864fd045f637
font_01_sfnt_off00010b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1E 11336 bytes
SHA-256: 0cb8af5c29de40cc424f4a44adce2c160ecd0eb06e09a942c99bc36286a586d9
font_02_sfnt_off00013224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13224 16144 bytes
SHA-256: f7f944af48a1f29a4fc81369acbb7667dc0c0bb312d09d0e658341ed730dbf86

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