Malicious PDF — malware analysis report

Static analysis result for SHA-256 d213f2d2f6be77a9…

MALICIOUS

PDF

88.1 KB Created: 2021-05-10 03:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47477d878bd3a2e2d0108035e4c978a8 SHA-1: 13e1d74b7f683aa199af421a66b26312037e25e6 SHA-256: d213f2d2f6be77a92b62a4a43c87a6e53aa85a2a102279c85eb3f144f3f1122d
124 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'resalured.ru' and multiple other unknown URLs suggests an attempt to redirect the user to a malicious site. The heuristic 'SE_URGENCY_LURE' and 'SE_CALLBACK_LURE' indicate the document likely uses social engineering tactics to prompt user interaction, such as clicking a link or calling a number, to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=where+to+buy+pre+cooked+christmas+dinner PDF link annotation
    • http://profer-opt.ru/294175659120bkgx.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/davefiforitemilosuj95bk3.pdfIn PDF document text
    • http://universityru.fun/topamibiwekabevazejisaw5pec7.pdfIn PDF document text
    • http://skidki-day.store/nagolabozugopakom4k1o.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/download_logarithm_and_antilogarithm_table.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/glSifgY/select_55_beer_nutrition_information.pdfIn PDF document text
    • http://futup.ru/fake_call_simulator1vats.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/gfKEvhj/58237267450.pdfIn PDF document text
    • http://helpforteam.com/833714679e0bnw.pdfIn PDF document text
    • http://habirovradik.ru/fedomokajagikolom7u5e3.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/enlace_ionico_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/fHcjfKh/59346362264.pdfIn PDF document text
    • http://ighelpcenter.xyz/does_my_modem_support_5ghzjgel4.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/63805990265.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/gagoxokedomawopop.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/solid_waste_management_project_proposal.pdfIn PDF document text
    • http://boomua.site/ximuvijetunidejobhqpl1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ratixifo/zedirabudikasetu.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/gravimetric_determination_of_chloride_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/92948193103.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/xutovozukufegibe.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/43118151386.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/gelelojapoxoxore.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/is_cosrx_salicylic_acid_cleanser_good_for_fungal_acne.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/46453183588.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_off00010e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E60 5600 bytes
SHA-256: 5be51e166a30a79719efa02bef9613a8df15206d157c23cf9532a95b2c8ca07f
font_01_sfnt_off00012140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 1668 bytes
SHA-256: 58e7f84bbf37aa131a58ac458993f60406512ee61f157a8a40ac65c6e446dcfd
font_02_sfnt_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 12084 bytes
SHA-256: 751d27280542194ea59258dbea08a0b41648eed1e8be2a5d90cfe6e514e2167d

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