Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c54919521e40a29…

MALICIOUS

PDF

40.5 KB Created: 2020-04-08 15:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fb5a0a27e54077e6753f92d111482ba4 SHA-1: e16de21e61256efd79723f6906db972a0137a289 SHA-256: 3c54919521e40a29af95c6ae1f4736375d12001a0454db1215029ce491519582
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named PDF files hosted on unrelated domains. This pattern is indicative of a link farm or SEO abuse tactic, where the document is designed to drive traffic to these external sites. The ML classifier strongly supports the malicious nature of this PDF.

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://bineshdhakal.com/uploads/1/3/0/4/130479389/130479389.html#que+significa+norma+iso+14001
    • http://fashionsurvival.com/uploads/1/3/0/2/130289395/7384571.pdf
    • http://bladebooking.ca/uploads/1/3/0/7/130739597/bajedawodivoletol.pdf
    • http://qbinvictus.com/uploads/1/3/0/9/130969284/81e74a0344d53c5.pdf
    • http://sustainableconceptsdevelopment.com/uploads/1/3/0/3/130379429/af58853c00924a.pdf
    • http://thejerseyoutlet.com/uploads/1/3/0/9/130969868/229189.pdf
    • http://thecrazynese.com/uploads/1/3/0/4/130476483/tugowopur-piralesonevaj-lufotesifad-gazudifiwes.pdf
    • http://cruxportal.com/uploads/1/3/0/7/130775277/c4abcd38629145.pdf
    • http://cynthiasmerrill.com/uploads/1/3/1/0/131071253/c90763c39.pdf
    • http://moneygramvnvn.com/uploads/1/3/0/6/130604201/dikox.pdf
    • http://paradigmlifefitness.com/uploads/1/3/0/6/130604636/bukowegadubik_lutag.pdf
    • http://bloombodycare.com/uploads/1/3/0/6/130639347/xasogomudine.pdf
    • http://spire-athletic.de/uploads/1/3/1/3/131380032/dubogu-bumufapado-jidokokazasabud-fobujagu.pdf
    • http://goldnewmexico.com/uploads/1/3/0/9/130969260/d8936027ab36e.pdf
    • http://hollywoodbeautythreading.net/uploads/1/3/0/5/130590200/sadasitut_vanozen_wulavupuduzi.pdf
    • http://gavilanbff.com/uploads/1/3/0/3/130379681/0ddb1617d.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_off00007464.bin
9253d8a56e8797bf6ef1c97f645c75cfdf1976b8a30d7bfe9f7e1df0ce30edc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7464 8472 bytes

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