Malicious PDF — malware analysis report

Static analysis result for SHA-256 62baf50870e8320e…

MALICIOUS

PDF

43.1 KB Created: 2020-03-31 02:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e638ccaa1d5f4edbc6b1bde8414c43b2 SHA-1: e7bc0d12b65278cdcec5e1c21b0b79767081bd1a SHA-256: 62baf50870e8320e79ca23015014cc93622863e39ffe00084aa0beb975731a09
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous PDF_SEO_LINK_FARM heuristics confirms the suspicious nature of the embedded URLs. The document body itself is heavily obfuscated but contains references to URLs that are likely part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://murraywhiteley.com/uploads/1/3/1/3/131380641/131380641.html#riddle+vault+of+horus+walkthrough
    • http://legacyleadersdt.com/uploads/1/3/1/3/131383510/b8989d3.pdf
    • http://homelandstory.com/uploads/1/3/0/7/130739559/135961.pdf
    • http://northwestclubracer.com/uploads/1/3/1/3/131380598/fojaxetonosegerunu.pdf
    • http://westkrete.com/uploads/1/3/0/4/130488311/67e8e4e2d75d2bf.pdf
    • http://mishpuchacards.com/uploads/1/3/0/5/130545485/kiribufojag_mukorukise_letedasuniwop_saxofed.pdf
    • http://ancestral-pathways.com/uploads/1/3/0/5/130539053/1955914.pdf
    • http://alliedassetdocumentation.com/uploads/1/3/0/3/130324236/5902349.pdf
    • http://stjohncic.org/uploads/1/3/0/2/130272377/soliz.pdf
    • http://alisha-madison.com/uploads/1/3/0/4/130476141/jebinojemazaxedateda.pdf
    • http://choicewellnessbystacy.com/uploads/1/3/0/4/130488969/regulepo.pdf
    • http://makemoneywithsoccer.com/uploads/1/3/1/0/131071196/juwepus.pdf
    • http://impressyourprofs.com/uploads/1/3/0/9/130970009/zogawozovifi-fixemepatoze-jepav.pdf
    • http://35dollar-tickets.com/uploads/1/3/0/4/130483670/4726896.pdf
    • http://northernanaes.com/uploads/1/3/0/2/130272981/fuwoxazive_bosubekadimo_xogam_jotajivopo.pdf
    • http://wildpct.com/uploads/1/3/0/6/130604983/ce2af355a64.pdf
    • http://whosyourhoosier.com/uploads/1/3/0/4/130483086/mesavu.pdf
    • http://kang509.com/uploads/1/3/0/5/130590367/3126754.pdf
    • http://fixmytaxexperts.com/uploads/1/3/1/0/131070829/abb0657.pdf
    • http://seniorsalliance.org/uploads/1/3/0/5/130590717/3380310.pdf
    • http://heartandhomechef.com/uploads/1/3/0/2/130271113/kizufuvovapuso.pdf
    • http://bonfiremediastrategy.com/uploads/1/3/0/8/130874123/mowidowufutij_lekav.pdf
    • http://coloradocanparent.com/uploads/1/3/0/6/130639036/5756948.pdf
    • http://animenewsnetwork.org/uploads/1/3/0/5/130550744/pobuxa.pdf
    • http://apexstar.org/uploads/1/3/0/4/130477074/pazipifiwo.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e6f.bin
1a02bedf6a3c2670f65e8aed50e77a7fc937bc2ee1c26b8314f82a311c23dc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6F 7848 bytes

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