Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f052d563e57de88…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 03:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2f9ed06d4e7c708a1873c7f79676266d SHA-1: e730abb61cac95ed1922c106484266168576726e SHA-256: 0f052d563e57de88eab9c098dae5622105ffa4f4d19007ad879e65a8e13091e6
196 Risk Score

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://baarspo.ru/wb?keyword=how%20to%20become%20a%20computer%20repair%20technician PDF link annotation
    • https://cdn.sqhk.co/gepumenujeme/pjc6Mhf/polesitabilaf.pdfIn PDF document text
    • https://gituwelogasof.weebly.com/uploads/1/3/2/8/132814340/xavunopu_temariwox_fabiso_dexikiwutovewup.pdfIn PDF document text
    • http://passive-income.ru/31535957925iwtu1.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/jejfjhv/starcraft_311bh_reviews.pdfIn PDF document text
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/4763321d5bbd8af.pdfIn PDF document text
    • https://xoxopazivufa.weebly.com/uploads/1/3/5/3/135398299/556c388b.pdfIn PDF document text
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/9156131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/26379096459.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/school_incident_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/casualty_loss_deduction_2017_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/lawawekujivesojapuwalata.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/deep_english_words_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/10_envelope_template_word_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/89829865690.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/aflac_claim_forms_for_short_term_disability.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_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 5156 bytes
SHA-256: 0402937229e10a0e5854df14173e8206e048f0c7b94680fad2f2f728bf00c971
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 11272 bytes
SHA-256: 110b8012952faee44cbe7a1dbdaa8da47b96b5462f5a1ea3a4abe1a4abb83a21