Malicious PDF — malware analysis report

Static analysis result for SHA-256 757961ba1d4e304c…

MALICIOUS

PDF

67.9 KB Created: 2020-03-29 11:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 995932982da6a075886748682f3db073 SHA-1: 58cda982be06dd901f6e9e2fb66c8e23e5c8b51a SHA-256: 757961ba1d4e304c16eec4ccac3f383af352a53e9400d9a08f33a1c284f8a2d1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, indicating a potential link farm or SEO manipulation scheme. The embedded document body text, though heavily obfuscated, contains a URL that points to a suspicious HTML file. No scripts were extracted, but the PDF structure and numerous external links suggest a malicious intent to redirect users to potentially harmful websites.

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://us.momotombochocolatefactory.com/uploads/1/3/0/2/130289784/130289784.html#1+juan+5+15+explicacion
    • http://digitalsleepaid.com/uploads/1/3/0/6/130622024/xixarumina_lugevat_kivesewali_wuremeso.pdf
    • http://jacotfamily.com/uploads/1/3/0/6/130639509/7165961.pdf
    • http://oytdisenoymadera.com/uploads/1/3/0/5/130545128/7127823.pdf
    • http://gatheringnations.org/uploads/1/3/1/1/131163666/dopozolusigax_kewewuma_ginemode_koxopobip.pdf
    • http://multiservicesmjc.com/uploads/1/3/1/0/131070485/5068653.pdf
    • http://colleenbardelli.org/uploads/1/3/0/7/130776649/xadiwavama.pdf
    • http://emybikes.com/uploads/1/3/0/3/130379199/9976091.pdf
    • http://communityhacking.com/uploads/1/3/0/6/130621238/fawumiputazetodo.pdf
    • http://englishpracticecentre.com/uploads/1/3/0/8/130813400/pixolizonewinabis.pdf
    • http://livesmithlake.com/uploads/1/3/0/6/130620961/357674.pdf
    • http://logotiquedigital.com/uploads/1/3/0/6/130604576/5431339.pdf
    • http://octanegarageandperformance.com/uploads/1/3/0/6/130639105/lezilusekufozewoju.pdf
    • http://capeeshprep.com/uploads/1/3/0/2/130271250/f89c476173f.pdf
    • http://peterpullen.com/uploads/1/3/0/9/130969702/44ec1245.pdf
    • http://trackwell.org/uploads/1/3/0/2/130271212/putif.pdf
    • http://nakomaplazaauto.com/uploads/1/3/1/0/131070452/2081514.pdf
    • http://acs-kw.com/uploads/1/3/0/6/130621304/9574618.pdf
    • http://valleycapitalrealty.net/uploads/1/3/0/9/130969470/jixiferuponag.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_off0000de19.bin
dba7fe27267942dd6bf9ee705d253a8e88a476763af2517a0ac14736774e0ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 9896 bytes

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