Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010ed31033b1c37…

MALICIOUS

PDF

90.4 KB Created: 2021-03-18 22:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a9ac0f98325826bde141b7a1eb0e723 SHA-1: 73a6e3cb0c7cdfeff18cffdd0d040e79b2cb1c8e SHA-256: 9010ed31033b1c37ccb234c7e1911f48036871bff89ca3b0eec428c3a7fe3fc6
126 Risk Score

Malware Insights

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

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The PDF contains numerous embedded URIs, with at least one pointing to a suspicious domain ('dugedepap.ru') that is likely used for phishing or to host further malicious content. The presence of many distinct hosts and links suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=ellen+powell+siren PDF link annotation
    • http://lozomaneje.getenjoyment.net/thomas_merton_center_louisville.pdfIn PDF document text
    • http://labiosdewonda.com/mini_story_lessons_englishduuns.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/fundamentals_of_astrodynamics_roger_r_bate.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/97818360728.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/71132869017.pdfIn PDF document text
    • http://garderob-podolsk.ru/pete_the_cat_snow_daze_reading_levelf1tzh.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/lezudaxavopo.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/82985529959.pdfIn PDF document text
    • http://titoto.xyz/wokaziririrejixreusx.pdfIn PDF document text
    • http://hookup756.fun/niwutarubidase6qit.pdfIn PDF document text
    • http://mufajaku.medianewsonline.com/cours_tronc_commun_bac_international_maroc.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/casting_defects_nptel.pdfIn PDF document text
    • http://foyou.store/21423617895gokx1.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/mathematics_textbook_grade_10_12.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/osho_courage_the_joy_of_living_dangerously.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_c7c9538a6a184e0da20f1ab58fcb5754.pdf?index=trueIn PDF document text
    • http://dojafeduzig.myartsonline.com/risexamujapiduxoximis.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_fb00bac99bbb471bbb4fbab019215227.pdf?index=trueIn PDF document text
    • http://mafokesa.onlinewebshop.net/pemisozejikokezesibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f0cea1-9c3f-4936-bba6-92c14ebc32a7/xulebaditapiparen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/775ea850-2b3d-42df-a145-f0ea5b1ae213/zodisogawebagevewagoziden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7318ad60-a662-4285-a5ae-f2b136f4dced/copm_assessment_shirley_ryan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d0e4b4-c094-49aa-a42b-8562e8b5d157/why_is_antigone_a_greek_tragedy.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_22c6499cf776458283c3cbadbed14dc0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd1864a-d65e-4e28-b18f-e1f80dfd0312/konanipekesuxil.pdfIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_3f2c0d40ed9d46e1a8739b75f9c6f83a.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_a76eff20a3884c7fa29d9efab5d673a9.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 4652 bytes
SHA-256: 7910f70e80a565a54f9c27341d33e3cf018d26f55e552817502ae050ac1851b3
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 2024 bytes
SHA-256: a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554
font_02_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 12300 bytes
SHA-256: e2951fdf421da24406434a0262386b0d4db036b5099050f4e652a419e550ce02
font_03_sfnt_off000144c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C2 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9