Malicious PDF — malware analysis report

Static analysis result for SHA-256 30afa6c66add8b2a…

MALICIOUS

PDF

77.5 KB Created: 2021-02-23 17:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: aec59293b4ce86d8e34450fed305c20d SHA-1: b6fc585b6fb2276b7426978860d30e22ae556844 SHA-256: 30afa6c66add8b2a124f7b99cc90d60df49d7c02b482577502c85735a411e069
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains a query about 'iPod costs' which is likely a lure to direct users to these malicious sites. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or spam distribution tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+is+the+cost+of+an+ipod PDF link annotation
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/vezabimudut_dadubi_dezipanugipeb_muvewiw.pdfIn PDF document text
    • http://vsspb.ru/gitamebinabejenegighnyb.pdfIn PDF document text
    • http://wowitaly.pro/gikogibuxamock45.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/21619c.pdfIn PDF document text
    • http://draiwenstore.online/uppababy_mesa_reviewsy78vb.pdfIn PDF document text
    • http://fit-italy.space/basotho_clansqeaze.pdfIn PDF document text
    • https://tabikajodunel.weebly.com/uploads/1/3/0/7/130739544/matedazudukogo.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/apoorva_kannada_movie_songs_free_zip.pdfIn PDF document text
    • http://meserowogawak.iblogger.org/8971064447.pdfIn PDF document text
    • https://nijumaweka.weebly.com/uploads/1/3/1/3/131379182/tizudo-fibanurowuwiv-nanopowirulugid.pdfIn PDF document text
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/vizalumosavawugako.pdfIn PDF document text
    • https://zenamuvevabun.weebly.com/uploads/1/3/1/4/131453902/1295337.pdfIn PDF document text
    • http://vojirumabi.22web.org/lepalofidenoxaxazufefetat.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/wubofosi.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/dadogul.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/gufuwidopanivuxaxazulojiefboy.pdfIn PDF document text
    • https://muxamaxipusitu.weebly.com/uploads/1/3/4/4/134470051/6204237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magajavopisili.epizy.com/mazegubikixoponokutip.pdfIn PDF document text
    • http://kuxukinilu.rf.gd/mujogowodezalinapopaga.pdfIn PDF document text
    • http://dizibabazuvuxu.rf.gd/2005_buick_lacrosse_owners_manual.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_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 5128 bytes
SHA-256: ae2c8ae969f64a76f97ab51e6a72545beb1a63d333dbf455fa6c9d65b958d84a
font_01_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 11220 bytes
SHA-256: 852f539aca212e4cafab7e45e5b550c967097ae4e3ee483e46cee2c0ba640322

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