Malicious PDF — malware analysis report

Static analysis result for SHA-256 368df4390897fc59…

MALICIOUS

PDF

41.3 KB Created: 2020-03-09 03:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: c472f362835e9a1630e9a487a58c0d09 SHA-1: 78e006e88e6307da924dbaeabe46e5245cece5d9 SHA-256: 368df4390897fc5987e568bb4ab4c2257f1f9869e10ad91b2817396d950213e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the PDF structure and numerous URLs suggest a delivery mechanism for further malicious activity.

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://gracecartercapstone.com/uploads/1/3/0/8/130874167/130874167.html#simple+sentence+structure+for+esl+students PDF link annotation
    • http://twistingtrailsandtales.com/uploads/1/3/0/5/130544190/6637541.pdfIn PDF document text
    • http://dj3po.com/uploads/1/3/0/5/130589061/jurigaforupukabapof.pdfIn PDF document text
    • http://coventina.blog/uploads/1/3/0/6/130604333/dd5dbdde31b709.pdfIn PDF document text
    • http://plumluvfoods.com/uploads/1/3/0/8/130873794/votogo.pdfIn PDF document text
    • http://amyerspainting.com/uploads/1/3/0/7/130738707/pipixo.pdfIn PDF document text
    • http://adhillc.com/uploads/1/3/0/3/130323155/4256714.pdfIn PDF document text
    • http://www.anitacbaker.com/uploads/1/3/0/6/130603932/kipav-xegul-ponafuz.pdfIn PDF document text
    • http://saratogasirens.rocks/uploads/1/3/0/6/130621330/fupet-pafakoxix.pdfIn PDF document text
    • http://hostmaster.virtuago.it/uploads/1/3/0/8/130814448/saxomavas.pdfIn PDF document text
    • http://amy-bracken.com/uploads/1/3/0/6/130622110/kevagekejaliruf.pdfIn PDF document text
    • http://ashishyadav.com/uploads/1/3/0/7/130776148/1f461b5d.pdfIn PDF document text
    • http://dedicated-1-accounting.pleasingfood.com/uploads/1/3/0/9/130969407/9828946.pdfIn PDF document text
    • http://drakorwwdd.id/uploads/1/3/0/7/130738944/2363277.pdfIn PDF document text
    • http://myoppconsulting.com/uploads/1/3/0/2/130274319/043253a8e7.pdfIn PDF document text
    • http://www.rbljconsulting.com/uploads/1/3/0/2/130287932/bidozowe_kogitabibotowas_jikofabu.pdfIn PDF document text
    • http://lifeuncorkd.com/uploads/1/3/0/6/130604205/gugipavimilexupuzim.pdfIn PDF document text
    • http://qlcommunitychallenge.crowdrisetoolkit.com/uploads/1/3/0/3/130323962/tafuxaginaw-jinekorin.pdfIn PDF document text
    • http://nebraskatowshow.com/uploads/1/3/0/7/130776309/7444627.pdfIn PDF document text
    • http://lovaascabinetry.com/uploads/1/3/0/2/130270936/9013149.pdfIn PDF document text
    • http://concourssocial.com/uploads/1/3/0/2/130274169/wosijikekewivev.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 5

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_off00007983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 7736 bytes
SHA-256: 2eeb407cf618353dd55c12614ce710b3ec31e6541acd37cd536c89d7f965dae8

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