Malicious PDF — malware analysis report

Static analysis result for SHA-256 19712d40e8e451ba…

MALICIOUS

PDF

71.8 KB Created: 2021-02-15 15:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ca0b4a04546943d75cea13f648628564 SHA-1: f6eec6a108497baddea6b82b2a2d1f1af63be99b SHA-256: 19712d40e8e451ba671c0cc02f2b5b6a3ea7036a0327a2a325f4a5ce89b3f704
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jottigo.ru/wix?keyword=apk+editor+pro+apk PDF link annotation
    • http://visiblawty.com/97517367992oo8pr.pdfIn PDF document text
    • http://ighelpcenter.xyz/82496149217hpp5n.pdfIn PDF document text
    • http://useporte.xyz/49236648132gsml.pdfIn PDF document text
    • http://stickerrus.ru/sidufonegabudanijijipirs5ow4.pdfIn PDF document text
    • http://talkme-news.info/69862596729r1e63.pdfIn PDF document text
    • http://faceit.su/434409387144zoh5.pdfIn PDF document text
    • http://fullpisetc.ru/remoxuzisukolesemi5yklg.pdfIn PDF document text
    • http://com-connexion.xyz/selorujirnn7tu.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/suniwuguremuduvon.pdfIn PDF document text
    • http://fimewot.xyz/pvr_iptv_simple_client_2_zip_download6ni63.pdfIn PDF document text
    • http://uniques.space/sony_icf-_cdk70_manualwc17u.pdfIn PDF document text
    • http://sreda.city/83567932230h4r8y.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/midizaxopazeji/rusawasusejuxariwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/comparing_numbers_worksheet_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/formulier_aangifte_roerende_voorheffing_auteursrechten.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/98665265948.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/jodevezajobopune.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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 4796 bytes
SHA-256: 1f19432dc74d2dc685df70f647a463a351cb436ed61c7027a70d4fdaab3d003c
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 10308 bytes
SHA-256: 54f3a9f44884d6ff87e203671e16401f43737b3f85cc3d9adc37dd6eb6c1a972