Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26947005415ca28…

MALICIOUS

PDF

80.3 KB Created: 2021-03-20 01:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9a6ed34e1037e20a819034c02b050010 SHA-1: 17e14fca160c454c0ca85f5bb498b04edc7a9101 SHA-256: a26947005415ca2837dcd8e2a6c6948df87fb7da82fb6b2c4d5b3f5568a8bb98
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, https://zajinet.ru/award?keyword=arguments+against+the+death+penalty+pdf, indicates a lure related to the death penalty. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://zajinet.ru/award?keyword=arguments+against+the+death+penalty+pdf PDF link annotation
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/figinuvodogamuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_601712dbc4af1.pdfIn PDF document text
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/6997258.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/c6f2b.pdfIn PDF document text
    • https://xesukalo.weebly.com/uploads/1/3/5/3/135311970/58772.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/60b0012b53b172.pdfIn PDF document text
    • https://befutoxe.weebly.com/uploads/1/3/4/4/134443098/ruvezezinon.pdfIn PDF document text
    • http://fupomogusi.22web.org/underlords_elusive_guide.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/xodibenukalu-pitukepekanutu-vufinavopiliz-fejiwe.pdfIn PDF document text
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/4069425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450424/normal_5fec9872a5d88.pdfIn PDF document text
    • http://zofokesagofot.22web.org/vikudivagajil.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/wumagoxanatotapepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fc89d14c7602.pdfIn PDF document text
    • https://jeripakituwimug.weebly.com/uploads/1/3/2/6/132695489/9532eaa929f988e.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/siromolenekef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwejepemesifo.epizy.com/ethnic_conflicts_in_pakistan.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_97d637cc23714aefa7905dc802b1106d.pdf?index=trueIn PDF document text
    • https://ef4f51cf-aae9-439d-85d5-db2134c8a05d.filesusr.com/ugd/8a9083_7827f7b2cdab4b2699023aae43f10779.pdf?index=trueIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_153e62687d234f3095ce2dc9112a3f79.pdf?index=trueIn PDF document text
    • http://filubukuwewe.epizy.com/alice_walker_everyday_use.pdfIn PDF document text
    • http://ziwibavufu.rf.gd/47347426238.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_1e21573f5b224720ac2835c7ebed3f13.pdf?index=trueIn 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_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 5544 bytes
SHA-256: 683a43b39fa295a2a7aa7e48feb9d0422ab147d524c002fdbc4ba082456c9c87
font_01_sfnt_off00010e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 10852 bytes
SHA-256: 542c6b0fad14c1a9e954221b945f5fcf0b4ca6880798a354d21a0a7333a73e39