Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be42805c560d0bf…

MALICIOUS

PDF

71.9 KB Created: 2021-02-18 17:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 760b4a870de1802f38d179f886ddfae7 SHA-1: c5e547bcee37e77dbca872a9d77ec3317ee39aad SHA-256: 3be42805c560d0bf8baf49b15a62bae4883f89b2c3c6df1b4b8345db6837f00b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=example+of+descriptive+and+inferential+statistics+pdf PDF link annotation
    • https://cdn.sqhk.co/gupimupiset/cLOqueJ/roar_city_rampage_dx.pdfIn PDF document text
    • https://cdn.sqhk.co/gumojitoxowu/0tBwojh/cute_teddy_bear_1080p_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/fgc9gh4/cnc_shaper_free_review.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/bb216dde02debac.pdfIn PDF document text
    • https://cdn.sqhk.co/xozakatupab/bibphiI/30399839194.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/2jchrzF/feparo.pdfIn PDF document text
    • http://workmonster.net/52430013451wtvx6.pdfIn PDF document text
    • http://hydra.moscow/53171589116qaa6m.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/Eigiiia/gasuwalola.pdfIn PDF document text
    • http://item-mask.top/how_to_put_chicken_on_ronco_rotisserieznyec.pdfIn PDF document text
    • https://cdn.sqhk.co/sexipemajim/hgifeyB/zoom_video_call_software_free_download.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/zamuriza/87525745770.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/cinema_4d_r21_plugins_free.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/47334114878.pdfIn PDF document text
    • http://noxifepa.rf.gd/fire_accident_investigation_report_sample.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_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 5384 bytes
SHA-256: c89d86316ccf93b1504bae537d1c0f7d27e6cafeed262463639ce2a78aea4771
font_01_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10824 bytes
SHA-256: e2c100bfe7aa7308c3f7b3e4107e7bd6f759dfc79ee60e85b83f27dfadaee075