Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba64979e32a83b9e…

MALICIOUS

PDF

75.1 KB Created: 2021-05-12 23:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f558148eb323fd5d922ec02c376f4b08 SHA-1: dfc7e55fc3c6e3b30f25a377fb4932eda8894539 SHA-256: ba64979e32a83b9eb609f1e9307c77bce7810340cdab0b5447fbb3400796579e
134 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous external URIs, including one pointing to 'xezojetit.ru' which is likely a phishing or malware distribution domain. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to an 'embroidery machine service manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=swf+embroidery+machine+service+manual PDF link annotation
    • http://modezewop.mygamesonline.org/gifedojiritusobopuroj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_601416b2bd7ea.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/7049291.pdfIn PDF document text
    • http://egrn-order.online/perimeter_and_area_of_composite_figures_worksheet_answers4glf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_605b54db007d5.pdfIn PDF document text
    • http://ctuxuu.com/senuwixeburowu11gtz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5fe4f72bf093a.pdfIn PDF document text
    • http://ueuniti.xyz/demolition_derby_2020_texastpkd4.pdfIn PDF document text
    • https://vozunekoba.weebly.com/uploads/1/3/4/9/134902797/d5a8c6b0f463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5fde7799111c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478408/normal_603cb661b42ed.pdfIn PDF document text
    • http://podeves.xyz/6862686129dzqak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420476/normal_5fcea53cb4ebd.pdfIn PDF document text
    • http://agent-ritual495.online/platform_ajay_devgan_ki_movie_platformkizq7.pdfIn PDF document text
    • https://nudikiwo.weebly.com/uploads/1/3/4/0/134042489/wavemakakuju-pinekesepajif-wewudaxono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapomajaberi.epizy.com/46134818492.pdfIn PDF document text
    • http://vifotuniso.rf.gd/how_much_do_house_trusses_cost.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/19020661600.pdfIn PDF document text
    • http://palibam.atwebpages.com/90126571528.pdfIn PDF document text
    • http://suvapik.epizy.com/jeep_wrangler_frame_repair_shop_near_me.pdfIn PDF document text
    • http://segimoto.myartsonline.com/bifamedumi.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_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 5756 bytes
SHA-256: fa728d536db2df9a171966f1ba268f330fcb65e1794d3b37b16f0b03eda1b305
font_01_sfnt_off0000fb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB11 10604 bytes
SHA-256: be6416a4d2c72e8384e29403c3d71a34ade3ab88076e78256897b7023a1ef3dd

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