Malicious PDF — malware analysis report

Static analysis result for SHA-256 73202e43d7d084c9…

MALICIOUS

PDF

73.2 KB Created: 2021-03-09 18:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6ab44faf55dacba8d2639d662045c232 SHA-1: b4e34bd2c0fdfbeacdc3b04dc04bbb3a269ac6ce SHA-256: 73202e43d7d084c9209821392caa304ab820913b29fced6fc9de343833b92150
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://lozipotod.ru/award?keyword=apple+to+zebra+chart+pdf PDF link annotation
    • https://vejexuwelukilik.weebly.com/uploads/1/3/5/3/135340180/xovon.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/78888692250.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_often_to_change_transmission_fluid_honda_crv_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/behjy7j/78226812650.pdfIn PDF document text
    • http://ravinugamajako.iblogger.org/pebaredegu.pdfIn PDF document text
    • https://benesigonej.weebly.com/uploads/1/3/1/6/131607635/288b70b24.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/davis_vantage_vue_6250_eu.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/dhgoEGi/mababis.pdfIn PDF document text
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/sasilesofokaso-wibenuk-wagigotatufopir.pdfIn PDF document text
    • http://padujosa.22web.org/reducing_to_lowest_terms_fractions_worksheet.pdfIn PDF document text
    • https://vidapuromojesa.weebly.com/uploads/1/3/4/8/134890941/dapadediv.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/12431482280.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/76107061714.pdfIn PDF document text
    • https://boboxike.weebly.com/uploads/1/3/2/7/132710801/6781849.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://rinonefor.rf.gd/al_quran_online_indonesia.pdfIn PDF document text
    • http://pokukalaso.rf.gd/pikiruluguliwiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/32537831055.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/europass_cv_template_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/41279742889.pdfIn PDF document text
    • http://wujawejibizub.epizy.com/pomerutipibe.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/fisizebopezimitutuvuvezel.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/lolomave.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_off0000d4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 4880 bytes
SHA-256: 6a4f7cec8b633336f03f42220d4e731694c7a5fae8181b35f588beec767218f3
font_01_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 10492 bytes
SHA-256: 21c53c4032e2c5674ffbb1505470f05bc0ba8b549fb953a582e724facc7330e5
font_02_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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