Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7763040748271d…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 19:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5fb43cc1ae602591a799c3da835284d0 SHA-1: 8b05915e0cf379d895365d290556d2df1d50469b SHA-256: 7c7763040748271d0a28c8c0a9c3da65f5b09f623cdd4b00508ab24c4ef90bd8
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=step%201%202021%20dates PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/j1giric/steam_tabletop_fest.pdfIn PDF document text
    • http://igcopyrightforhelps.com/nuzolabomakkvnl1.pdfIn PDF document text
    • http://powerhdniy.space/15821085618hpt0v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5ff42083b2c34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5fef0aca12a04.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/tjdiegf/flip_skater_game_pro_skateboard_endless_3d_games.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/xcgiljb/2129711229.pdfIn PDF document text
    • http://instacopyrightcenter.com/walubrnbh0.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/hglUigR/22300998010.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/dgf4rgg/download_game_talking_pierre_the_parrot_mod_apk.pdfIn PDF document text
    • http://7lessons.fun/69374605047iaaqg.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/genedonapubefe/apple_beta_profile_ios_13.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kebobafotamurizuwonu.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/climograph_worksheet_garrett_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/89783454543.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/bacterial_toxins_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/likubupajipov.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/64250491878.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_off0000deac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 5252 bytes
SHA-256: 1a9503f8ddb0287b494fb18e19ad20919fc66ee50ec774f4d8cc4f1d49d179df
font_01_sfnt_off0000f09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09F 10596 bytes
SHA-256: 62bb1c1762e080ed5978290ba47c22e7c9d874115c4e688941a33fa065874efd