Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa564fa7db421dd…

MALICIOUS

PDF

55.5 KB Created: 2020-05-22 18:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 4a9a7fc71b3cf587a4c1925024dea1f9 SHA-1: d5fe711799734cfc948f8494d491b9bf55704ce7 SHA-256: 6fa564fa7db421dd811290b979f5a5c55759e6f0ff161b6c0012931a74891061
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://32f.undesirable.us/uploads/1/3/0/8/130814706/130814706.html#6mm+creedmoor+load+data+with+reloader+26 PDF link annotation
    • http://informdiets.com/uploads/1/3/0/7/130738723/kunapelupubuke.pdfIn PDF document text
    • http://radiomajaja.com/uploads/1/3/1/3/131398093/c0d39eb.pdfIn PDF document text
    • http://cpanel.phimi.pt/uploads/1/3/1/4/131408230/mafagazofej_lazumefas_bigowumeri_zuxajulepudox.pdfIn PDF document text
    • http://techwheelhouse.com/uploads/1/3/0/3/130323110/2253295.pdfIn PDF document text
    • http://wholesalecabinetshouston.com/uploads/1/3/0/7/130738719/donunibamexa.pdfIn PDF document text
    • http://michianadrugtestingcenter.com/uploads/1/3/0/4/130483041/tabaxare.pdfIn PDF document text
    • http://architecturebyeuanmiller.com/uploads/1/3/0/5/130590496/bc69e7ee49749e9.pdfIn PDF document text
    • http://bayarea-interactivehypnotherapy.org/uploads/1/3/0/2/130270985/19d4360.pdfIn PDF document text
    • http://coastalalllinesadjustingcompany.com/uploads/1/3/0/6/130639456/d4185ba35.pdfIn PDF document text
    • http://rowandco.org/uploads/1/3/0/3/130379266/9d4067d1b42436b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 11380 bytes
SHA-256: 4ee3b1967ab6aadd41d29b23d195d7f40943aeafca6f714941d2a9b3b65ccf3f
font_01_sfnt_off0000bcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFF 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b