Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf0b4a2a1ba8c3d…

MALICIOUS

PDF

40.9 KB Created: 2020-06-11 20:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 79aeb3147f3042a3111580278b603bda SHA-1: 01e493f91a86472ddd8f886426fceffcdfc0eabe SHA-256: 9cf0b4a2a1ba8c3d07dd3a875b3d122889da6e6c22fd8f50914059bdf08e0cdf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm or SEO manipulation scheme. The embedded URLs suggest a potential attempt to redirect users to malicious content or to engage in spamming activities. The document body itself is heavily obfuscated and contains some of these URLs, reinforcing the malicious intent.

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://to.undesirable.us/uploads/1/3/1/4/131453610/131453610.html#dryvit+details+pdf PDF link annotation
    • http://promlimos.org/uploads/1/3/0/2/130273571/xovomedonevason_mumude.pdfIn PDF document text
    • http://ulyssessgrant.vip/uploads/1/3/0/8/130874015/8153028.pdfIn PDF document text
    • http://walkinmyshoeministry.com/uploads/1/3/1/8/131858108/e7dce82c5a2.pdfIn PDF document text
    • http://45jokesaboutmydeaddad.com/uploads/1/3/0/2/130289158/rizefiferepuku.pdfIn PDF document text
    • http://220-server.skaitube.com/uploads/1/3/0/3/130323208/8656618.pdfIn PDF document text
    • http://hostmaster.akemi-bnb.be/uploads/1/3/0/5/130551249/gafudodulifuni-mabirig.pdfIn PDF document text
    • http://quartermaster-capital.com/uploads/1/3/0/6/130639440/2181551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xanojebukeki525275366.files.wordpress.com/2020/06/mezepevebaki.pdfIn PDF document text
    • https://jezowiv.files.wordpress.com/2020/06/nukokadixeti.pdfIn PDF document text
    • https://rudukaleditu308957543.files.wordpress.com/2020/06/neleduzamenifonuw.pdfIn PDF document text
    • https://zotaxaf.files.wordpress.com/2020/06/zijitutetarerag.pdfIn PDF document text
    • https://xaxuxite.files.wordpress.com/2020/06/42966045839.pdfIn PDF document text
    • https://nutumomox.files.wordpress.com/2020/06/zutejegiwisuloba.pdfIn PDF document text
    • https://fewabomomafe.files.wordpress.com/2020/06/deperonejarenisobi.pdfIn PDF document text
    • https://panezurazid.files.wordpress.com/2020/06/56353989076.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 10252 bytes
SHA-256: 85151abf1e8475f1e25edc2d498b3fff114a46265563c4ce65c3d16274044c2f
font_01_sfnt_off0000811a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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