Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee36efc6257930a…

MALICIOUS

PDF

48.8 KB Created: 2020-07-21 09:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6da6fd23d7f910526bf1191bbf29acf SHA-1: 356b4692d55d1545ebdd6723ee4d8e0ea33b0dc6 SHA-256: 0ee36efc6257930a17d5083c404014e7b2d85a85a85ac4ccb7b420dc1e7717b8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'management and administration pdf', likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.cc/pify?keyword=similarities+and+differences+between+management+and+administration+pdf
    • http://files.sctecentralfl.org/uploads/1/3/1/4/131438167/1e052b12e.pdf
    • http://files.eugeniojedimartinez.com/uploads/1/3/0/8/130873738/gidalofaz.pdf
    • http://files.cjx2graphics.com/uploads/1/3/1/4/131452887/967396.pdf
    • http://files.jewellersguildofgreatersandringham.com/uploads/1/3/1/4/131407704/favofojebixaz_gelapoxidip_zigigegu.pdf
    • http://files.hawkecreations.com/uploads/1/3/0/9/130969182/254043.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/93332986028.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/wajapitaran.pdf
    • https://kozaxijewob.files.wordpress.com/2020/07/18769827219.pdf
    • https://mafegazavete460328079.files.wordpress.com/2020/06/18180629160.pdf
    • https://bedurezagofu.files.wordpress.com/2020/07/vemonebeditaki.pdf
    • https://jozenomo.files.wordpress.com/2020/07/38687772857.pdf
    • https://vatudim.files.wordpress.com/2020/07/loluvurigum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/95294394204.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/sudugububexoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/pemujifurolepogoxapipoxem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3543/4901/files/28951399009.pdf
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/74072525847.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/53645546461.pdf
    • 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_off0000801e.bin
44b05797343af781c511d8b59d9877719d9d3df5fa91ef6309b27429ccfb490e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 5600 bytes
font_01_sfnt_off0000930c.bin
2ba7fd4b6b5e9515929144d4363be55068f2c288e3da798e2c049d7fc018bbba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930C 10040 bytes

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