Malicious PDF — malware analysis report

Static analysis result for SHA-256 0851f86904ece40e…

MALICIOUS

PDF

33.0 KB Created: 2020-03-26 02:26:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e267e315b714beb68af24b7e02ab9bcd SHA-1: 4a8bb66ccf843d65e7b23437bcc48f82dbd6a845 SHA-256: 0851f86904ece40eab3e5b19abb0f36217e8549ecfecd6f0810ac5b09e5c3557
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a method to distribute malicious content across multiple sites. No scripts were extracted, but the sheer volume of outbound links indicates a malicious intent to redirect the user, likely for SEO manipulation or to serve further malicious payloads.

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://montanapurewood.com/uploads/1/3/0/6/130604349/130604349.html#ray+diagrams+for+converging+lenses
    • http://gladandginger.com/uploads/1/3/0/6/130620897/koxavopagojibule.pdf
    • http://sarah-leavitt.com/uploads/1/3/0/7/130776299/1372922.pdf
    • http://thenterprisegroup.com/uploads/1/3/0/6/130604807/kelikeginetiten-somoto-bukogabugokoto-sexeziju.pdf
    • http://bravesblog.com/uploads/1/3/0/7/130776644/decf4ea.pdf
    • http://35andunder.com/uploads/1/3/0/6/130620437/kokaw-lavomu-farusadivoze.pdf
    • http://hsoods.org/uploads/1/3/0/7/130776444/c94809763.pdf
    • http://chirodoctor.info/uploads/1/3/0/4/130435682/5127826.pdf
    • http://autodiscover.dcachurch.net/uploads/1/3/0/7/130738765/xinavibujinimum-rabuwib.pdf
    • http://www.dynashiftlinkage.com/uploads/1/3/0/6/130621579/rexuzuj.pdf
    • http://womencentered4success.org/uploads/1/3/0/6/130621205/bixixirukesi_wenerumazowi_vozijabe.pdf
    • http://researchtomorrow.net/uploads/1/3/0/6/130620159/4000391.pdf
    • http://mixedsf.com/uploads/1/3/0/6/130621201/04cf7f0e8d1aecc.pdf
    • http://www.mjlgroupllc.com/uploads/1/3/0/4/130476040/solajudufir-siwafibonipewi-fegobiliwonune-tubodov.pdf
    • http://www.cambraicollection.com/uploads/1/3/0/6/130604117/0c14291f65.pdf
    • http://covagurl.com/uploads/1/3/0/7/130740502/42902db7.pdf
    • http://admin.rs-joinery.com/uploads/1/3/0/8/130814448/xoduviw-fevufoduzibos-jesozotokuja-xexikegadetas.pdf
    • http://hospicehangout.com/uploads/1/3/0/2/130270904/4563395.pdf
    • http://ernesttham.com/uploads/1/3/0/5/130590521/2213354.pdf
    • http://detroitfitclub.com/uploads/1/3/0/8/130874347/f6cb87.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_off00005c8e.bin
1d93e29aea1bd601b38590a6f62f0140e1511d9c745d25d1788a085ffd464fa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8E 6540 bytes