Malicious PDF — malware analysis report

Static analysis result for SHA-256 24aca726fe7a65f9…

MALICIOUS

PDF

70.0 KB Created: 2021-02-21 15:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 03a3663b74b6e96ea1c63669d44d3840 SHA-1: 18fb4b0f46fcb4d92e2d32bcd25661d730227dea SHA-256: 24aca726fe7a65f92198cc07b90e49accddfe27e32b341ff28607151c025f9be
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://bologen.ru/wix?keyword=document+control+jobs+houston PDF link annotation
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/begikotimevepixi.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/jd1egfD/85454576246.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/ghjcBje/car_horn_sound_ringtone_download.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/2ea312a6716db.pdfIn PDF document text
    • https://nekonidi.weebly.com/uploads/1/3/0/9/130969497/4d982.pdfIn PDF document text
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/gufupiluworu_wozafa.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/3381883.pdfIn PDF document text
    • https://medivurufif.weebly.com/uploads/1/3/1/4/131407406/00261d5e33.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/forupokisip/zelda_breath_of_the_wild_guide_ign.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/labels_for_jars_free_template.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/cisco_bgp_config_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/what_is_the_coldest_place_on_earth_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/admission_information_of_ahsanullah_university.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_off0000d73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73D 5044 bytes
SHA-256: 5139d7b357e7dfd9c928a4f39620d277ceb71925544461196e822ffcff4110fc
font_01_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 10428 bytes
SHA-256: 3a614cd377b5746024745a69bb6fdc5e71b4d4038a3d03b742cdc10d55d5b577