Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cbbbbc3797f308…

MALICIOUS

PDF

76.6 KB Created: 2021-02-02 00:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36c7e48d5a6df04555f35f0d1aab5f23 SHA-1: 01b06e9ece3a6fc9e34978d6794adce0a6456d47 SHA-256: 92cbbbbc3797f30828db3ce18d0782c4d652ab3fa370747540503ea28017eb0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or phishing operation. The presence of a Minecraft-related lure in the document body, combined with the numerous external URLs, indicates an attempt to direct users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=minecraft+village+walls+mod
    • https://cdn-cms.f-static.net/uploads/4489237/normal_60129554052c9.pdf
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5ff8028c20a88.pdf
    • https://jerimokini.weebly.com/uploads/1/3/4/4/134484757/taparokezosuv_kerekekosilaf_janaladowuva_siwix.pdf
    • https://zigakenipipoto.weebly.com/uploads/1/3/4/1/134131781/rifib-sedenarulim.pdf
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fe6783bd7df5.pdf
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/rofibidamuw_nagitupe_tenolafinadenem_givapaw.pdf
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/vavarefujepu.pdf
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60151e01a38cc.pdf
    • https://pumejikugo.weebly.com/uploads/1/3/0/9/130969330/3393626.pdf
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/243e58b805607.pdf
    • https://cdn.sqhk.co/jivomawufem/VeWyhg1/swing_states_2020_fox_news_map.pdf
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/zezevezevomu-moluvirebura-tiwexako.pdf
    • https://cdn-cms.f-static.net/uploads/4448735/normal_600fd482ce8b1.pdf
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fd3b14654bd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efab.bin
256cc895ef61995582c6ba621a468fc9c6d0dec8f9d2fe5e51717766e13ea270
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 5496 bytes
font_01_sfnt_off00010267.bin
531c22d7c0ba0abcbd1e6abf64d5ed8af92cdd1526fd59d2022484ce8339ebd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 10280 bytes