Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebedb832b7ccfb8…

MALICIOUS

PDF

34.4 KB Created: 2020-04-02 05:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: bc1e5242bc63d2398c15f8ddf70bbbf9 SHA-1: 6aae05137859ef4bb8c83176d62c8283813670a2 SHA-256: eebedb832b7ccfb8c94b9a2067ba5d361db8ca6a7c4bd5837193dba02792a41b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to manipulate search engine results or distribute content across multiple domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link redirection.

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://qadomaintesting-04-19.com/uploads/1/3/1/4/131406036/131406036.html#majestic+fireplace+model+mbu36i PDF link annotation
    • http://wwww.jelleleistra.nl/uploads/1/3/0/8/130874681/6781804.pdfIn PDF document text
    • http://scentneutrality.com/uploads/1/3/0/9/130969553/zadiduwime.pdfIn PDF document text
    • http://essentialoil-education.com/uploads/1/3/1/3/131379699/9a80430aba19a3.pdfIn PDF document text
    • http://jodiedolls.com/uploads/1/3/0/3/130324315/suvuzodo_koremomixi.pdfIn PDF document text
    • http://beeronlyfast.com/uploads/1/3/0/5/130589019/96294198c9cd9.pdfIn PDF document text
    • http://emmausroadpegs.com/uploads/1/3/0/7/130776277/8dcf8c987b.pdfIn PDF document text
    • http://rentingcentraloregon.com/uploads/1/3/1/4/131453555/kifarad_baguxivoge_zojasukovawo_rovasigasobor.pdfIn PDF document text
    • http://wadsworthupward.com/uploads/1/3/0/7/130776428/77c7ec939c8ef5.pdfIn PDF document text
    • http://ecosoccdiaspora.org/uploads/1/3/0/6/130604771/ruzuwixatawekuzeb.pdfIn PDF document text
    • http://kimberlifreilinger.com/uploads/1/3/0/5/130588876/fitisupapewolaxo.pdfIn PDF document text
    • http://jgholbrookdesign.com/uploads/1/3/0/5/130538925/tutozujuwunij.pdfIn PDF document text
    • http://erikhansenart.com/uploads/1/3/0/7/130775655/ravewomivisusakape.pdfIn PDF document text
    • http://aufuturclothing.com/uploads/1/3/0/4/130483819/6384850.pdfIn PDF document text
    • http://leafit2me.net/uploads/1/3/0/6/130620670/7067676.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA8 8276 bytes
SHA-256: 501edd7898324095ce7d4f2d7fb978f25632f3c2f831d54d770a9db0e8429d5a