Malicious PDF — malware analysis report

Static analysis result for SHA-256 804451566eb2b6dd…

MALICIOUS

PDF

62.6 KB Created: 2021-02-10 22:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e48b7353228296393d1438e114775814 SHA-1: 3db43b254553dea08ffe83cab58ba22d7aca3bdf SHA-256: 804451566eb2b6ddeb2f834352eace71acdf4895a4645e4349ea04894afdcbdc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/wb?keyword=ppi%20interest%20calculator%20spreadsheet PDF link annotation
    • https://cdn.sqhk.co/joxesinejag/gdtkCij/nickname_generator_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/vakujediraw/higdCgc/zebum.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/iT95gjo/60238099751.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/zexomekafeborama.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/lalQjgY/bbq_ribs_restaurants_near_me_that_deliver.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/g73iipe/senate_polls_map_cnn.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/cWnhjcl/70542763812.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/1160636.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/ibhj3ge/defender_hd10_top_speed.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/jbjhbXZ/history_of_christmas_traditions_in_america.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/tozaduliwubega/4d_live_wallpaper_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/jusagawub.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/cissp_actual_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/rowepelezuna.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/82939636121.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_off0000bb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3E 5164 bytes
SHA-256: 4207d90b3b520f33ac7109430eba8290bd0fcb7d05e0f2c9200b0040a5cda835
font_01_sfnt_off0000ccbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBE 9680 bytes
SHA-256: 3858d171154005fa1c381d9e1ecc837a7c2a48fff6cfedf015285cbe15d7e380