Malicious PDF — malware analysis report

Static analysis result for SHA-256 5870e7076f100a97…

MALICIOUS

PDF

37.3 KB Created: 2020-03-29 22:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 43bac1ba6a8a9d925a880651b402e5a5 SHA-1: 364054ab2b337004074d90b6b50b2a5cacf1bc97 SHA-256: 5870e7076f100a977784abf3b0c5ef1ecf7ddab44861326c7ad0e9fb79841865
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body is heavily obfuscated, but the presence of URLs indicates an attempt to redirect the user to potentially malicious content. No scripts were extracted from this sample.

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://princess-crown.lucky1st.com/uploads/1/3/0/5/130589179/130589179.html#harrisburg+parks+and+rec+nc PDF link annotation
    • http://financialcoachingshop.com/uploads/1/3/0/6/130620839/pajefi-vugonupone.pdfIn PDF document text
    • http://cartcootiecovers.com/uploads/1/3/0/9/130969429/5432501.pdfIn PDF document text
    • http://nashbw.info/uploads/1/3/0/7/130738562/zonojowiwideb-dosido.pdfIn PDF document text
    • http://bertienkok.nl/uploads/1/3/0/6/130620572/2445762.pdfIn PDF document text
    • http://passalive.com/uploads/1/3/0/4/130475881/zisalobaxogavofe.pdfIn PDF document text
    • http://houserepair.club/uploads/1/3/0/6/130620453/a4ea36073.pdfIn PDF document text
    • http://glassworx.info/uploads/1/3/0/5/130539287/c2cc5.pdfIn PDF document text
    • http://onlyhave.com/uploads/1/3/0/2/130291713/532824.pdfIn PDF document text
    • http://stoney.vip/uploads/1/3/0/6/130603995/9882138.pdfIn PDF document text
    • http://oldmillbakerygvl.com/uploads/1/3/0/6/130604022/5163295.pdfIn PDF document text
    • http://globalskillet.com/uploads/1/3/0/2/130288488/9150550.pdfIn PDF document text
    • http://swwabsolar.com/uploads/1/3/0/7/130776027/jujomasekivekuvegi.pdfIn PDF document text
    • http://thepiecesofautism.com/uploads/1/3/0/2/130272516/nakapebix.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
🗂 Part of campaign: cartcootiecovers.com 4 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 8140 bytes
SHA-256: 3994a27ffbaeb615901a3e9dd1cbec80a957c0b4611ed64c16a4c3667bcce2e8