Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f2c62ea1fefd6f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-14 23:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 244ce35e7ea1ff15eebefda40ad4a0d3 SHA-1: 782addeb6f23a92186158c57b6013c5adb9bc97e SHA-256: 50f2c62ea1fefd6f9fdfbf0b7abd701212a88761e9b2f802c9e7470aaed3b07a
254 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
  • 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://yafferge.ru/wix?keyword=asr+10+service+manual In PDF document text
    • http://blue-tick-central.com/nibidunofopusebufamiperuyv8ik.pdfIn PDF document text
    • http://vereffka.xyz/dungeons_and_dragons_character_background_sheetergxo.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/6Ojajj2/wood_statue_carving_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5ff0889671c55.pdfIn PDF document text
    • http://natlegend.space/61460429406lf621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd6783998b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_6027e0acdb6f2.pdfIn PDF document text
    • https://dedaxasufebix.weebly.com/uploads/1/3/0/7/130775271/rixolowipis-migewi.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/vdyggQC/93464707016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc713111a67b.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/ficidfs/vertigo_attack_sweating.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_601f3887ca500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5fe348f2781b3.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/biggd5I/bupuvejojefunekufeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_6012932ae5fa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff0ca8ac11dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_5fd3cd7150feb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fca0c7cae137.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_off0000e072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 5188 bytes
SHA-256: e83107bfe8ac8f73c89fdea7177f3eebad9a977488b8e8f20b9fb7d433e67cff
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 11216 bytes
SHA-256: dbd947e16d694d731cde675adabe3b3f8a61abb2e08e565b06bc20b81bd4accc