Malicious PDF — malware analysis report

Static analysis result for SHA-256 77af616d0117e6b9…

MALICIOUS

PDF

72.1 KB Created: 2021-03-01 11:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e6e9af29996831cefcb2f6425533386e SHA-1: 0d78bd1440b9508592a158cccbc32f525a10f004 SHA-256: 77af616d0117e6b9866c9c52b63d954294f96ddf3ec4eeeb83c836ee5e4b171f
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://soxebez.ru/award?keyword=conversion+de+llaves+de+pulgadas+a+milimetros PDF link annotation
    • http://goodshopsales.xyz/nissan_370z_nismo_faceliftogvsa.pdfIn PDF document text
    • http://bioforce-co.site/654312768076z3zy.pdfIn PDF document text
    • http://flipping-car.online/labojodatategugiseftk9m0.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/d2ef39947.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/suliforofagavabebafu.pdfIn PDF document text
    • http://trokot-new.online/who_moved_my_cheese_spencer_johnsonz4vo4.pdfIn PDF document text
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/8507237.pdfIn PDF document text
    • https://fuwudasex.weebly.com/uploads/1/3/1/0/131071129/xitudezijusedev.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/sinamozagemoger/kale_chunar_wali_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/employee_reference_letter_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/kadaderogetuwesububebel.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/holliston_ma_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/2161259146.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/character_reference_template_for_a_friend.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/jotoi_koro_bahana_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/bowajuvupegojelijexaropi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/84283728485.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/1080700031.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/housefull_4_songs_bala.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/bittorrent_client_for_windows_10.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_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 5244 bytes
SHA-256: ab4b7274ac2a4a782a059bc8e49e2820144fab4ee357b300e66d060ef8e71730
font_01_sfnt_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 11724 bytes
SHA-256: f1b4116c6c884c9a782c0a1550acc07eaabb36a5041794480a16bf247b988ffc

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