Malicious PDF — malware analysis report

Static analysis result for SHA-256 9733bb1e6542c704…

MALICIOUS

PDF

75.8 KB Created: 2021-02-28 00:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a39ce7444944851e1223f9d381ba5a78 SHA-1: d1e67a237deb01fb8e4a87afa667ec94a77349d8 SHA-256: 9733bb1e6542c704a246d38bd9b73232d8df4805448e38c2fa9464ab799cda35
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wb?keyword=how%20do%20i%20attach%20a%20usps%20customs%20form PDF link annotation
    • http://xufubub.iblogger.org/bluecoat_school_nottingham_uniform.pdfIn PDF document text
    • http://websecurer.tech/bufodomagt5f4m.pdfIn PDF document text
    • https://regasefes.weebly.com/uploads/1/3/1/8/131871592/verexosur.pdfIn PDF document text
    • https://pexevirojaloko.weebly.com/uploads/1/3/4/8/134882405/dodute.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ihcRRjb/29562989203.pdfIn PDF document text
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/surudifusuzifik.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/ee9a9227a4.pdfIn PDF document text
    • https://bajixaxazuxu.weebly.com/uploads/1/3/1/3/131383864/vamulel-ralipezefa-revuxozife-zidetokurona.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/azggYjf/jomanokuvitupabirano.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/xididezifijuvasamiw.pdfIn PDF document text
    • https://luxiwejewukon.weebly.com/uploads/1/3/0/7/130738755/6495200.pdfIn PDF document text
    • http://show-visitor.xyz/toolbox_mod_for_mcpe_0._14._0_apk1wch4.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/rowitazanetokatizufa.pdfIn PDF document text
    • http://konovulibugu.iblogger.org/64115937999.pdfIn PDF document text
    • https://popugimamad.weebly.com/uploads/1/3/0/7/130775647/3abd9bef4.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/evLrFid/pukavuwabi.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/48391534112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabenejajoko.myartsonline.com/8918707493.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/57575745498.pdfIn PDF document text
    • http://mulagokonud.rf.gd/37445839086.pdfIn PDF document text
    • http://kuvuzoruzanawip.epizy.com/gupatitudewajibarudas.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/dokop.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_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5416 bytes
SHA-256: 64c90dd6731574f8ee7c5b049ed28f96910ef005dfe34ee246a970b5443958f4
font_01_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 10584 bytes
SHA-256: a8db3e606493651e66793916826d7cb30a5506f6fe5cb88186c66d736f3b283e

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