Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51057b9aca0d39d…

MALICIOUS

PDF

70.5 KB Created: 2021-01-24 08:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ad08bddaaeb5b043e157b612d74beaea SHA-1: fbac6efca765ef89585b44951fa5da00a17ee4e0 SHA-256: f51057b9aca0d39d8209b6c47763eb52092db0530bb2686b51907b065ddb5778
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=samsung%20tv%20art%20gallery%20app In PDF document text
    • https://site-1177077.mozfiles.com/files/1177077/70558473852.pdfIn PDF document text
    • https://site-1167950.mozfiles.com/files/1167950/pixel_buds_case_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/hGjcggm/to_the_moon_and_back_movie_quote.pdfIn PDF document text
    • https://site-1220367.mozfiles.com/files/1220367/59779357950.pdfIn PDF document text
    • https://site-1084153.mozfiles.com/files/1084153/best_movie_collection_organizer.pdfIn PDF document text
    • https://giliwafe.weebly.com/uploads/1/3/4/0/134016831/6240030.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/ravatopisefuvonut.pdfIn PDF document text
    • https://site-1248265.mozfiles.com/files/1248265/denakutagavorudakeped.pdfIn PDF document text
    • https://site-1249842.mozfiles.com/files/1249842/16017185789.pdfIn PDF document text
    • https://site-1171584.mozfiles.com/files/1171584/23187765951.pdfIn PDF document text
    • https://site-1192291.mozfiles.com/files/1192291/dumegewabo.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/jeUeCja/freading_app_store.pdfIn PDF document text
    • https://site-1172308.mozfiles.com/files/1172308/dragon_quest_viii_3ds_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/gitihhf/dulan.pdfIn PDF document text
    • https://site-1172508.mozfiles.com/files/1172508/among_us_ejected_screen_wallpaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD752 5404 bytes
SHA-256: 9929916d3b9dcf55d27954778a670b271c4c9f7cddeda9bbd53fb6a2244fc018
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10456 bytes
SHA-256: 3857c49791a69f00c431b765b391f71098bcb2b7e4a01ca7be00e9ce901b5d11