Malicious PDF — malware analysis report

Static analysis result for SHA-256 31bcc6c848864862…

MALICIOUS

PDF

72.5 KB Created: 2021-03-07 17:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3ec4ba89650408ac0ed4aefd6e68fa82 SHA-1: 5ffde316f05b17f77b3eec67c429f8547b6efa56 SHA-256: 31bcc6c8488648629c7dbfcbe431041c171a35429b2048f52f20ddb64d5c1fe0
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/award?keyword=download+idm+terbaru+kuyhaa+android PDF link annotation
    • https://nowesepi.weebly.com/uploads/1/3/1/1/131164229/6322667.pdfIn PDF document text
    • http://kuvusobapi.iblogger.org/pigezazokeloliwixa.pdfIn PDF document text
    • https://gojijaxokan.weebly.com/uploads/1/3/0/7/130739343/dekelifojo_dadazidisude_serowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_60415738cb3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_6037306c07a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_5fea225f243cf.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/piwepamexapir_wilatin_xonunel.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/lotegulesojetip.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/norazax_wufunun_funixuxojanu_wukimosikuf.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/leruwegasimud.pdfIn PDF document text
    • https://fifiruzi.weebly.com/uploads/1/3/0/7/130775727/7415ad.pdfIn PDF document text
    • https://tinubuwetoka.weebly.com/uploads/1/3/5/3/135325034/9210095.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/fumure-vorusubalet.pdfIn PDF document text
    • https://vuvudarekiw.weebly.com/uploads/1/3/4/0/134017261/215850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_600ab01aa76de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f522aa91-e7da-47ff-8380-d01272545bcc/scientific_method_review_worksheet_middle_school.pdfIn PDF document text
    • http://lemujiv.epizy.com/wejatuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a2354a-c056-4a0f-9873-ccf5d680a695/pesirisatoxulob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dcef39-77eb-4233-9b36-2d2ecb28d047/how_to_apply_letter_of_credit.pdfIn PDF document text
    • http://jowosidinaruxu.rf.gd/how_to_wrap_a_present_not_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e52d4dd-8ec9-4aa7-b243-8ec6e86d7366/iata_dangerous_goods_regulations_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 5284 bytes
SHA-256: 59d2688c5a8190173ac02b3c66e660d1b905448aab951327ba3ae7c49653df59
font_01_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 10472 bytes
SHA-256: 2763fba3fc1003ad3ca233834a8ff04f0f0abefb4a11962e3bf3d0bca77bcf3c