Malicious PDF — malware analysis report

Static analysis result for SHA-256 31030e12964854bc…

MALICIOUS

PDF

76.7 KB Created: 2021-03-29 02:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b563e9bf4c9bd7f4c8ff26dc5bdabac4 SHA-1: c41194ff5a13fa4406a3efa731909dcbb0c4d913 SHA-256: 31030e12964854bcad6e8068c477a12abb32d75d67a61b03c76cf0052d9a3159
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO redirector farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wix?keyword=young+living+weight+loss+trio+testimonials PDF link annotation
    • http://jadogaxarabu.mygamesonline.org/biblia_mas_antigua_en_espaol.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/52117540548.pdfIn PDF document text
    • http://nopopoxozexa.iblogger.org/aviation_safety_magazine.pdfIn PDF document text
    • http://kojaruw.iblogger.org/planck_s_law.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vupileloluxus.rf.gd/22773091769.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/top_penny_stocks_january_2021.pdfIn PDF document text
    • http://texavit.epizy.com/data_analysis_procedure_sample.pdfIn PDF document text
    • http://tewowes.rf.gd/chinese_to_english_translator.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_6c393efe85f042aa97fdd566084a1472.pdf?index=trueIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_1deac75ceed84931a2fe87efacc3418b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/92691986410.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/missing_noir_m_ost.pdfIn PDF document text
    • http://dipodowimovaxi.epizy.com/warhammer_40k_dd_5e_conversion.pdfIn PDF document text
    • http://zavedofidime.rf.gd/tus_zonas_errneas_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/rozotovewizosarapezos.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/52707385843.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

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_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 5212 bytes
SHA-256: de901ee7b87609ff5d52cb0e156c977472ee15cb9fddf35d9a8a5fa010ef4fd5
font_01_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 10824 bytes
SHA-256: 12db0987467fabc6a0c5b1f67baf4049653baee96eef2cb86807d4d02f7f395a

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