Malicious PDF — malware analysis report

Static analysis result for SHA-256 772cd18f55413ca2…

MALICIOUS

PDF

89.4 KB Created: 2021-03-18 00:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8ff7b87b7fff330ebbb7f7a194303940 SHA-1: b1c359f16963fad1bdc1d4c0781f9988b9bc4688 SHA-256: 772cd18f55413ca246cf4c20e74b4fe7981c829dcafe58840dabf2efc85585dd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to 'Fcic/ncic full access certification manual', indicating a pretext for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=fcic%252Fncic+full+access+certification+manual PDF link annotation
    • http://telemprom.xyz/what_the_bible_says_about_drinking_milkqkmdf.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/zulumizemem.pdfIn PDF document text
    • http://aycotoro6.xyz/fobum4i7vd.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/EnfhciC/sticker_sad_memes_y_frases_tristes_wastickerappes.pdfIn PDF document text
    • http://nature-ital.space/dixepepopidimuxigamkx8py.pdfIn PDF document text
    • http://civiliscmq.online/zageneveremuwivixal4xcx.pdfIn PDF document text
    • http://nabizutun.iblogger.org/vosukisiwojepizovesagiw.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/L4hczic/23874384320.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/matematicas_financieras_capital_concepto.pdfIn PDF document text
    • http://sayseedokg.com/382200275797fmtf.pdfIn PDF document text
    • http://prolac.ru/lakshmi_tantra_booky7kj8.pdfIn PDF document text
    • http://odemebayisitrafik.com/organic_chem_lab_survival_manual_10th_edition848v1.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/how_to_calculate_effective_nuclear_charge_using_slater_s_rule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9f5a16ae-5352-4b8d-80bd-d683305e24d4/diarios_de_motocicleta_libro_amazon.pdfIn PDF document text
    • http://talanusedos.epizy.com/68470338173.pdfIn PDF document text
    • http://gerifanonejuvad.rf.gd/new_tax_laws_for_landlords_2019_filing.pdfIn PDF document text
    • http://kufelinal.rf.gd/xagivanibat.pdfIn PDF document text
    • http://xakodalomidu.rf.gd/50586621500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba02069d-369b-478e-86d3-433c380294b1/how_to_turn_m2_into_cm2.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_off00011531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11531 4900 bytes
SHA-256: 7f5772f1d5a22da532f5a09840a220e267875b270b2cffbd1f3de90ef3a5032f
font_01_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 10524 bytes
SHA-256: 7ece08a481323d1008f7c5c671a90960d43cb982e0b934c0250a04edad2902e6
font_02_sfnt_off000149a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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