Malicious PDF — malware analysis report

Static analysis result for SHA-256 05534fac7d1a670c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 19:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ddb8edcaffa9b066f935fe6ecb2c67bb SHA-1: 85a7ca92ceec24f3f1f1f1642c4b0d17b8b18c1d SHA-256: 05534fac7d1a670c84ab4640462048c45a72651a96275e31c8a78b3a8c8c96dd
126 Risk Score

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 0.9995

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://resalured.ru/wix?keyword=last+shelter+survival+cheat+engine+2020 PDF link annotation
    • http://dimifepovez.22web.org/pevaronawezetuguxex.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/basic_grammar_in_use_evaluation_test.pdfIn PDF document text
    • http://jakor.pro/manualidades_para_nios_palitos_de_helado8ozea.pdfIn PDF document text
    • http://tarigutese.mygamesonline.org/proving_by_mathematical_induction.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://ing-cliente.com/kolemusugutopizusedodeg7hhw.pdfIn PDF document text
    • http://zujoxuxosaja.getenjoyment.net/abraham_joshua_heschel.pdfIn PDF document text
    • http://nasolanamisajo.iblogger.org/star_trek_the_next_generation_episodes_season_7.pdfIn PDF document text
    • http://clebohets.xyz/what_every_guy_wants_to_hear_from_his_girlfriendpxkwr.pdfIn PDF document text
    • http://richmaya.site/fexavisolasowotojutakgj27s.pdfIn PDF document text
    • http://nicechange.space/jixarimamuxiwapuvenus1hhp.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/68313616369.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://fozikabev.epizy.com/84844243498.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/corpus_christi_school_uniform_shop.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/6017079236.pdfIn PDF document text
    • http://wifotuzo.rf.gd/vezin.pdfIn PDF document text
    • http://wuduzinemaz.rf.gd/bitdefender_gravityzone_elite.pdfIn PDF document text
    • http://xazopufegi.onlinewebshop.net/bakery_business_plan_in_malaysia.pdfIn PDF document text
    • http://nogamijabuwemi.rf.gd/62099866855.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/lidomerakagati.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 5108 bytes
SHA-256: 2c02d72d4cd8ed90aeb34aad72ea558e588e94807a81ac356eaa3a27abf7c9e1
font_01_sfnt_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 11760 bytes
SHA-256: c8d4ac2ead79016b0fa9a9958dc245985a5c821fa0236dd919769a4ac077caa0
font_03_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378