Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bfb7cceda6313bd…

MALICIOUS

PDF

38.9 KB Created: 2020-03-21 03:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: da6959cb437d72928243d4d32e9431ac SHA-1: 1e1c549ff40113b2887349cac8bc1d4fb1cd8482 SHA-256: 4bfb7cceda6313bdbf4c96cfa1cee0d406c32387f77135a3bdb185a43e12ee7e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. One prominent link, 'http://twistedsugarut.com/uploads/1/3/0/7/130739648/130739648.html#download+adobe+flash+player+10.1', indicates a lure to download a fake Flash Player update. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading further malicious content.

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://twistedsugarut.com/uploads/1/3/0/7/130739648/130739648.html#download+adobe+flash+player+10.1 PDF link annotation
    • http://mocamarketing.com/uploads/1/3/0/3/130313299/777470.pdfIn PDF document text
    • http://mzzle.com/uploads/1/3/0/6/130621483/8821944.pdfIn PDF document text
    • http://freyafederico.com/uploads/1/3/0/5/130589241/0c22e0.pdfIn PDF document text
    • http://lushbeautynz.co.nz/uploads/1/3/0/2/130289466/pigiwaxereliv.pdfIn PDF document text
    • http://wilsonfarmmurfreesboro.com/uploads/1/3/0/2/130270990/9351757.pdfIn PDF document text
    • http://leadershipmartialartsacademy.com/uploads/1/3/0/5/130588237/xowanifitinabulaxa.pdfIn PDF document text
    • http://peoplehacking.net/uploads/1/3/0/6/130604788/dadujel.pdfIn PDF document text
    • http://www.inthedoghousetreats.com/uploads/1/3/0/2/130274322/belilozotufawal.pdfIn PDF document text
    • http://orockrotorua.co.nz/uploads/1/3/0/3/130324289/xunejeberefimizakexo.pdfIn PDF document text
    • http://www.inkwine.com.au/uploads/1/3/0/4/130476624/8846439.pdfIn PDF document text
    • http://shopp-italia.fun/uploads/1/3/0/4/130488412/bb063dc6e1c30e.pdfIn PDF document text
    • http://arriverealty.net/uploads/1/3/0/5/130588605/pafinowefemifaku.pdfIn PDF document text
    • http://webdisk.jagst.org/uploads/1/3/0/2/130271073/b27a3b6f.pdfIn PDF document text
    • http://phivosstavrou.com/uploads/1/3/0/6/130605471/zimififusa.pdfIn PDF document text
    • http://maralynhargrove.com/uploads/1/3/0/3/130379087/tafixilasef-zudod-vebujogura.pdfIn PDF document text
    • http://romanticism55.com/uploads/1/3/0/5/130551770/koziseda.pdfIn PDF document text
    • http://camptishomingo.org/uploads/1/3/0/2/130270768/banulomisi_lixugaweg.pdfIn PDF document text
    • http://artscienceweb.com/uploads/1/3/0/4/130483527/rugemanexog.pdfIn PDF document text
    • http://mikefk.com/uploads/1/3/0/8/130874376/1511852.pdfIn PDF document text
    • http://dahlstromforensicscience.com/uploads/1/3/0/4/130483617/adb72de138919c7.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 8480 bytes
SHA-256: 1b9a9759dcdc82f4a6406ff7196a8b1c148a5f3cacdca40e639f3008a51a6cff

Open this report in the interactive analyzer, or submit your own file for analysis.