Malicious PDF — malware analysis report

Static analysis result for SHA-256 84210c4cceb58cfe…

MALICIOUS

PDF

34.3 KB Created: 2020-10-01 11:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9c33e423fbe060c2649d5f14059d1ce0 SHA-1: 7449253670e5a7b223addd9a452019070231f43c SHA-256: 84210c4cceb58cfe01e12bc0e7fb07f4cdd1c27cd4ab336e496b14a853aba2a0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=d%2526+d+5e+sorcerer+spells+pdf In PDF document text
    • http://files.mrrizzi.com/uploads/1/3/1/1/131163761/1969364.pdfIn PDF document text
    • http://files.nwhfsc.org/uploads/1/3/1/6/131607075/rilov.pdfIn PDF document text
    • http://pumelega.goodnewsperthshire.com/uploads/1/3/1/0/131069898/muduteva_wixepefovabilon_pulosafurofekud_borojirugakosa.pdfIn PDF document text
    • http://files.thejournalofpolitics.org/uploads/1/3/2/6/132682327/xulijusawunib.pdfIn PDF document text
    • http://files.nwbavxgrp.org/uploads/1/3/2/3/132302819/f80dba4d648a088.pdfIn PDF document text
    • http://viviri.kathleengibbsauthor.com/uploads/1/3/2/6/132681670/zurosise-woxajewogar.pdfIn PDF document text
    • http://rudug.lifelonglearning-charlotte.org/uploads/1/3/1/4/131453194/ropuwolozupasax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/19491986521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6082/0133/files/hot_wheels_terrain_twister_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/vejova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/tabusinufawuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0459/4856/files/donelefowufesudetogifaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.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_off00004ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC8 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off00005cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF7 9424 bytes
SHA-256: 4e11d372ce977480a249886f605821e4fcec576003c33e0533d6aeef909be7f0