Malicious PDF — malware analysis report

Static analysis result for SHA-256 88721d4112c4ee84…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 11:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e5c29e26c55d9b5f68e7c8e82cb9afc SHA-1: da7d73435132ccad907fddf839f65517ee94bffa SHA-256: 88721d4112c4ee84360ac325cf35845316f047e1b432319b6caec11c7e9a1b62
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=wisconsin+right+to+life+voters+guide PDF link annotation
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/56d48e0d0c.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/kenagelevezifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_605600c24a399.pdfIn PDF document text
    • http://peteferix.mypressonline.com/74182335778.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/86567d3e4b6d.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/tutorial_autocad_electrical_2015.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/gazewazit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fe423e2e56a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_60515aa9ab484.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/lodizanufef-vokavutogam-feparepitaziraw-nofezifujira.pdfIn PDF document text
    • http://manybigs.space/divina_commedia_testo_scolastico7hzjl.pdfIn PDF document text
    • http://vovpomnim.ru/solucionario_economia_de_la_empresa_2_bachillerato_mc_graw_hill_2018iosvf.pdfIn PDF document text
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/594f0.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/jusegatavajub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fc70ea565156.pdfIn PDF document text
    • https://petozuxelilaf.weebly.com/uploads/1/3/4/2/134265439/moxoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_60217c223c5ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 5144 bytes
SHA-256: 6c543065b1483f2c6377f46faac09a0520eacc969332311131dbcb99f6cf4f94
font_01_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 11544 bytes
SHA-256: e2569e9078f972463906e5e3068bfe513ab3693593435306b967bd9ada4802ce

Open this report in the interactive analyzer, or submit your own file for analysis.