Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb23e924474ae12…

MALICIOUS

PDF

80.2 KB Created: 2021-04-28 00:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1e613bd9d29801bd1680402068fb263f SHA-1: 05663a1332fe23ea04d5a4525ff5ee2d96b99e67 SHA-256: dfb23e924474ae12c32f1d2c2cd1cde4d7c5c5f3a939269b5bab29ffceb7bffd
126 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, aiming to lure users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=pollo+loco+500+calorie+menu PDF link annotation
    • http://majedox.iblogger.org/bixevelozamijala.pdfIn PDF document text
    • http://satomupudogoni.22web.org/matudenajinovuvalajuxoja.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/ncert_english_literature_reader_for_class_10_download.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/63058224490.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/5738634387.pdfIn PDF document text
    • http://future-techno.ru/unfinished_tales_of_middle_earthkg35l.pdfIn PDF document text
    • http://jijufopofe.iblogger.org/suvutugaparadokapejid.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/58231262986.pdfIn PDF document text
    • http://dombitarf.ru/40647354581uymd3.pdfIn PDF document text
    • http://jupimok.iblogger.org/how_do_you_run_a_diagnostic_test_on_a_kenmore_he3t_washer.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/company_resignation_letter.pdfIn PDF document text
    • http://cleaner360.shop/fifty_shades_freed_cast_sawyerm7o5m.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
    • http://givemuzod.epizy.com/keroverirafiwelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c155dcd-16c4-4d55-8bfc-ec6fba55daf1/97967259287.pdfIn PDF document text
    • http://gafuxibeveguv.rf.gd/allen_bradley_powerflex_525_manual_espaol.pdfIn PDF document text
    • http://dawabarefexuf.epizy.com/que_elementos_de_la_tabla_periodica_son_solidos_liquidos_y_gaseosos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7b388b-1959-4068-a2e0-aa20916c079d/whats_the_difference_between_kitchenaid_artisan_and_professional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca274a6-cec1-4210-8cc8-1e49e31ec990/wudaxisakedurevolalofu.pdfIn PDF document text
    • http://fewuzefar.rf.gd/nasumavujebefedezosik.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_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 4836 bytes
SHA-256: 98221fee0b2a70dc7aeb25345dc15f7edf0fa3655567d0faa79d209d0882496e
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 11068 bytes
SHA-256: 41c395233cd72c7610e29a28444a274e41a0a484788ad7de2ce4ac10b84a7ad8
font_02_sfnt_off0001259b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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