Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaddd78766c256c4…

MALICIOUS

PDF

88.0 KB Created: 2021-05-17 18:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 09bab16f64d4acc3dac13c6c71c33835 SHA-1: 69b32206a5c70069aa22ec902bb3df5140bca087 SHA-256: eaddd78766c256c45d4cb7eacc95c115956f3cfe403208dffbcb2ba0922e7500
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm, likely for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites, possibly leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://nipisod.ru/strik?utm_term=context+clues+worksheets+multiple+choice+high+school PDF link annotation
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/xiwikelezel-muwud.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/jaieifY/city_fighter_vs_street_gang_apk_mod.pdfIn PDF document text
    • http://golivexi.22web.org/97636663437.pdfIn PDF document text
    • https://rasasagodum.weebly.com/uploads/1/3/2/3/132303335/7165692.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/vegajupimukosaxa.pdfIn PDF document text
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/93cd5aa.pdfIn PDF document text
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/gaxuzaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dorumexogik/hcgfnBV/36642791568.pdfIn PDF document text
    • https://zulemogosisuwo.weebly.com/uploads/1/3/4/6/134689329/3071859.pdfIn PDF document text
    • http://zonamumajotodot.iblogger.org/api_570_book_free_download.pdfIn PDF document text
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/lujadene_xuvog_jovodij.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/mugedawa-dogorad.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/XG2cbid/zifew.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/42666863247.pdfIn PDF document text
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/tiwelolujano-jijuvurobekexo-rorul-merodoxadot.pdfIn PDF document text
    • http://simupujumojata.22web.org/39848312725.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/jh1eMhb/fikuze.pdfIn PDF document text
    • https://dawawasokiju.weebly.com/uploads/1/3/1/4/131408838/tumifo.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/gj5otgh/93375581210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lirolono.epizy.com/folumoladazadojazo.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/rufidirozojupazi.pdfIn PDF document text
    • http://mugoguzof.rf.gd/61984328155.pdfIn PDF document text
    • http://zabukek.rf.gd/59059091767.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/algebra_1_readiness_test.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/can_be_used_to_communicate_with_satellites_brainly.pdfIn PDF document text
    • http://watidoterer.epizy.com/anopheles_species.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 5268 bytes
SHA-256: 25df7df321aaca415d1e2418daf96ddec6fa288e4a357554214a729aa37f04be
font_01_sfnt_off000114de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DE 11516 bytes
SHA-256: e43e14489c402512600ac38e8217cebd618cf9620f3c30ab05a584ae65bc4855
font_02_sfnt_off00013c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C66 16188 bytes
SHA-256: e0777f6a1bd995d4c9df845dda5573f86e03ad3e6a71cbf9cbbf6e8544b72fca