Malicious PDF — malware analysis report

Static analysis result for SHA-256 1805f3981a856958…

MALICIOUS

PDF

72.5 KB Created: 2021-02-21 01:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7a92a317d0c1232b4922b8db80e73004 SHA-1: 82132c266e4bcc5912896e12def155ef04ee3e67 SHA-256: 1805f3981a856958f596585fe4c06aaa0d2140984045ad93f8b31b1329da0970
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=interpret+the+remainder+lesson+2.7+answers PDF link annotation
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/fuxejisuluma.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/Tehhajg/74422810047.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/NQThegc/skyward_cisd_login_crowley.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/Njjjcia/14322810161.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/bpieiiG/josazefaro.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/608hbkw/super_adventure_pals_hacked_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/ZiKkgcu/mowakezozipekol.pdfIn PDF document text
    • https://valexipeval.weebly.com/uploads/1/3/0/7/130775413/laren_xobesotezop_susufofufuno_witawajidi.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/gijiShb/outdoor_survival_skills_games.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/kixezopiwe.pdfIn PDF document text
    • https://janafapaxe.weebly.com/uploads/1/3/1/6/131606835/sulidofegebibi.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/kefodek/wakonanudorarigu.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/amd_hdmi_output_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/reformas_borbonicas_sociales.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/free_2010_dodge_caliber_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/70145147420.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/blizzard_foren_warcraft_3.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_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 5472 bytes
SHA-256: 3cc717e7846bd9233f7f247b2356aa25cb77de7e3d35840a0181000ab548d9bf
font_01_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 10844 bytes
SHA-256: 45d8cbd37559f9cf80d2b58eba4365dbfd1dca22dffce395ed0c8d801baee391