Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ceced1b3d0965a…

MALICIOUS

PDF

70.7 KB Created: 2021-02-24 05:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 99fdbc20a74861b055a8ed781ee09404 SHA-1: b011d37f3eb2584bcb49816232352c07a6393cd6 SHA-256: 85ceced1b3d0965ae897d497d0a270ea1739d340d7aba6776e2597f84fb92d23
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body poses a question about EBT cards to entice users to click the malicious links. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=can+you+use+someone+else%2527s+ebt+card In PDF document text
    • https://kerobasoxegetun.weebly.com/uploads/1/3/4/0/134017970/wozerefasubi.pdfIn PDF document text
    • https://kefelewupu.weebly.com/uploads/1/3/4/7/134711224/kamotaduwofekut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc7d764ab97d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_601ad937c845e.pdfIn PDF document text
    • https://kezunegewekal.weebly.com/uploads/1/3/1/4/131483031/7335d9828795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_600573f8359ff.pdfIn PDF document text
    • http://xujosigij.iblogger.org/uniformity_meaning_in_accounting.pdfIn PDF document text
    • https://gobunelesivuwol.weebly.com/uploads/1/3/2/3/132303092/4638292.pdfIn PDF document text
    • https://zedemozotazodi.weebly.com/uploads/1/3/0/7/130776451/nejunomunoved-gedobokonu-fojeton-gafafezo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465905/normal_5ff14928cba27.pdfIn PDF document text
    • http://bubokap.iblogger.org/lamodivutisimem.pdfIn PDF document text
    • http://nizozipup.22web.org/tenomoluludekebupub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5ff33b955c306.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/jefobexapulow/android_version_7._0_update.pdfIn PDF document text
    • http://suxijiwuxupan.epizy.com/xogowowiwiveg.pdfIn PDF document text
    • http://fivemawafazixi.epizy.com/darevodizirajojomu.pdfIn PDF document text
    • http://giduzorim.epizy.com/19915342756.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/bang_bang_game_mod_apk.pdfIn PDF document text
    • http://jaxovisujopav.rf.gd/rebuvonomi.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/91781154369.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/javascript_date_object_to_string_format.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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 5264 bytes
SHA-256: de9a67ab24a3a65c6b40a45058e2d41dd84c0f43be2a277c3c8513b040bc0842
font_01_sfnt_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 10760 bytes
SHA-256: 448e4b7f3cccfef04202d0dc8cb06b347a96309462d7628b9e5018dd568a2561

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