Malicious PDF — malware analysis report

Static analysis result for SHA-256 7035914a320e9da0…

MALICIOUS

PDF

35.5 KB Created: 2020-04-02 11:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6e9256915299dc83189db9f859539602 SHA-1: 20ddf510a503d354bb9fea000bb617932abbdcbe SHA-256: 7035914a320e9da09a7db9f7957e4ab9559c791d91cdc20a2355ed5f42474b61
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The embedded URLs are likely used to host or redirect to further malicious payloads or phishing pages.

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://blingbyfee.com/uploads/1/3/0/6/130640022/130640022.html#itil+service+strategy+wikipedia
    • http://apologym.net/uploads/1/3/0/5/130589312/xudifekafole.pdf
    • http://thesouthernsigns.com/uploads/1/3/0/2/130270798/tuferav.pdf
    • http://stellarvoice.net/uploads/1/3/0/8/130813458/ritesavevalotu_sawosikod.pdf
    • http://voice-of-american-homeowners.com/uploads/1/3/0/7/130738620/lamatitejige.pdf
    • http://mobilemechanichuddersfield.com/uploads/1/3/0/6/130620773/beretokoxegu.pdf
    • http://usmvmcme1.org/uploads/1/3/0/6/130621654/visuvejozigapek.pdf
    • http://mycpfc.net/uploads/1/3/1/4/131406285/sexalovapew_xovujosir_wivexidatovigi.pdf
    • http://gracebcpc.org/uploads/1/3/0/6/130605146/vozewimizovup-mogirotuxobaxa.pdf
    • http://afteralltheseyearsbook.com/uploads/1/3/1/3/131382223/9b5b53a017cf59.pdf
    • http://avneetbansal.com/uploads/1/3/0/8/130813399/7671215.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_off000063bb.bin
1781dd5028fdaa8376632db25f4b5343cb75e0150a85adb7095315a5c5f3ec84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 7536 bytes

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