Malicious PDF — malware analysis report

Static analysis result for SHA-256 8629665a39d4c0b8…

MALICIOUS

PDF

91.7 KB Created: 2021-04-25 23:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5bae04af732675a270885238b3f2ebeb SHA-1: 65b3ce0c6a3c4915ff6f35c0c2273bd6fd8a4f0d SHA-256: 8629665a39d4c0b8b463d2664f3450c9642d766d57cd03ab01bcea92e7584449
126 Risk Score

Malware Insights

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

This 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, and one specifically uses a 'utm_term' parameter suggesting a phishing or tracking lure. The document body, though heavily obfuscated, contains metadata related to PDF creation and a reference to accessing an iPhone camera, which is likely a pretext to drive users to malicious links.

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://xajibur.ru/strik?utm_term=how+to+access+camera+on+iphone+11 PDF link annotation
    • https://cdn.sqhk.co/wiwevini/he4jcYx/lightroom_apk_upgrade.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/resalavep.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/fjh39UU/alphabet_in_english.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/66455693636.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/zumimexivepuwuw.pdfIn PDF document text
    • http://itmax.info/allen_bradley_micrologix_1400_manualrok5a.pdfIn PDF document text
    • http://sosed.market/halo_2_android_apkpit7d.pdfIn PDF document text
    • http://xelowonol.scienceontheweb.net/gypsum_ceiling_design_catalog.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/dujixogamuman.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/family_feud_game_points.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/64050290684.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/canon_mf3010_scan_to.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipipigi.atwebpages.com/korean_tagalog_dictionary.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/fibetaxedetonigizewazev.pdfIn PDF document text
    • http://xivobotaxonid.epizy.com/all_length_units.pdfIn PDF document text
    • http://tixobanawogoki.epizy.com/zetukenomumenuxogup.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/ascended_masters.pdfIn PDF document text
    • http://wesufonezis.epizy.com/behringer_x2222usb_service_manual.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_off00011237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11237 5244 bytes
SHA-256: 74af1743e29fe90f3ab5b6f16a07999534d874341d1b91b2398ecc83d33aa03f
font_01_sfnt_off000123f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F2 11152 bytes
SHA-256: 83851c988bae8630c81de20921c7cdcd862ad983e04a31626c0f4c2d1aadd1b8
font_02_sfnt_off000149f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F9 16352 bytes
SHA-256: 4c01831bdfffbafff55fd55c88415eb2201da44b622d6ec769a15ea8bc50db3f

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