Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af3de87c937c108…

MALICIOUS

PDF

68.6 KB Created: 2021-02-14 12:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da5004801cbb75a7f5e69b92f597d91d SHA-1: b2c26c814301ca182f1c564865dda5e4a410bf15 SHA-256: 1af3de87c937c1081699b9ffff84645fb445224ac0e7a909effc223e729f450f
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://jacksth.ru/wix?keyword=ergo+carrier+manual PDF link annotation
    • https://jokunotewe.weebly.com/uploads/1/3/5/3/135314966/gupobilaw.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/21907.pdfIn PDF document text
    • http://xonibiz.22web.org/credit_suisse_switzerland_ag_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/R4ghbig/how_to_cook_bacon_wrapped_pork_tenderloin_skewers.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/xenorixazipenof.pdfIn PDF document text
    • http://simkosa.website/xuvikowz2nuq.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/zoxobitolozivumarirerp6c9o.pdfIn PDF document text
    • http://frasqen.online/state_absentee_ballot_request_form_north_carolina0ikb1.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/duxigaruneg_judisatof_repumaxejoniwun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mofagadelebedos.rf.gd/boardwalk_minecraft_pc_apk.pdfIn PDF document text
    • http://fezivepe.rf.gd/diwinizijuroruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/9842071351.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/calendar_not_syncing_outlook_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/cae_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/nadozukojuzetuzogulinara.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00F 4900 bytes
SHA-256: 1d0a630b9d50001a096576e2d3e94dae4a59644959ee05bf6eff8a91dad1d700
font_01_sfnt_off0000d0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AD 9372 bytes
SHA-256: e324b9d1b8a41a41f59c3294f50edb080004e7f3589412055eb5a0d2e7ee5c30
font_02_sfnt_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 16072 bytes
SHA-256: 022d27efce85812889ff33f8e847cd1adfb9dec72dea85501dbffcfe415830a8