Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e65d624be27bca1…

MALICIOUS

PDF

115.7 KB Created: 2021-04-06 06:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df7a3311e7d0e20849d6f94a8e88fc3b SHA-1: 50cd83ca738293178474b84f89f76a2f49e57274 SHA-256: 7e65d624be27bca114f510c8bdfe505cac362f02b343df2375bddfa17cd7c360
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/strik?utm_term=macbeth+summary+in+hindi+video PDF link annotation
    • http://reduslim-europa.site/surat_ar_rahman_merdu_muzammil_hasballah89ia2.pdfIn PDF document text
    • http://oneitshop.info/33392958098kae5i.pdfIn PDF document text
    • http://boxberry-24.cc/14802074020qxhyj.pdfIn PDF document text
    • http://stickerrus.ru/notuzidusijilawuxivebedazphw0n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_6053180788a6f.pdfIn PDF document text
    • http://moneyindia.site/ibps_clerk_pre_puzzler9and.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/penijomikefajaanyub.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_6067a6c838fd4.pdfIn PDF document text
    • http://detonicro.website/algorithmic_trading_platform_pythonkaqv3.pdfIn PDF document text
    • http://fresh-ita.fun/88603604192gy3ar.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/how_does_vacuum_tube_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_602cf089deccc.pdfIn PDF document text
    • http://ranking-se.com/149944276847pwa2.pdfIn PDF document text
    • http://numulul.mygamesonline.org/rifumopexuwarivute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492259/normal_5fd07acd3f087.pdfIn PDF document text
    • http://gufutaca3.xyz/netgear_dgn2200_manual_greekklpnf.pdfIn PDF document text
    • http://bristol-yalta.run/sierra_reloading_data_300_win_mag9jm4z.pdfIn PDF document text
    • http://fizebiredasibi.mypressonline.com/family_violence_safety_plan_template.pdfIn PDF document text
    • http://eagleaff.com/64173943133htzdj.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/explain_the_economic_causes_of_french_revolutions1nnh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepitejususas.atwebpages.com/christianity_beliefs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172d9ce4-fa6f-4d0d-94b0-9feeaa6e2013/easy_german_books_to_read_for_beginners.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/62862362030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7060f1cd-0f3f-42c6-b244-5ccff6392028/another_word_for_answering_telephones.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_off00016e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E42 5456 bytes
SHA-256: 1788a0c9e5de12d3fa042334f98ba36915b357890b314be555a33c74569bb444
font_01_sfnt_off000180b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180B5 12060 bytes
SHA-256: ea55f5c1faecfa0d2f6b45f073d0046cdaf075552bb0867136b8df1eb10810d4
font_02_sfnt_off0001a9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9D8 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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