Malicious PDF — malware analysis report

Static analysis result for SHA-256 3456931816278850…

MALICIOUS

PDF

32.1 KB Created: 2020-04-03 02:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82c018c262ce47b4f89a13662b2daae1 SHA-1: a2f3193f4da4018a2fd1848f436f51250e105882 SHA-256: 34569318162788501e4522e4b8c7d52cd3bcabc04c00fcdc3295e5fc8096a30d
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF SEO link farm. The embedded document body text and the URLs suggest a lure to external content, potentially malicious. The ML classifier strongly indicates maliciousness, supporting the interpretation of these links as part of a malicious campaign.

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://fitnessprogramsdaily.com/uploads/1/3/0/7/130775109/130775109.html#the+wandering+earth+watch+online+english
    • http://panymasonline.com/uploads/1/3/0/2/130288626/tisikibiwuwape.pdf
    • http://karinemunkfinser.com/uploads/1/3/0/5/130589322/tifip_xipituro_xipuza.pdf
    • http://anastasiasjewelryhouse.com/uploads/1/3/0/5/130588618/mawelikulipapo-mekapaxibuwazi.pdf
    • http://nealcoxrealty.net/uploads/1/3/1/4/131437333/musomopev.pdf
    • http://akvidiyal.org/uploads/1/3/0/2/130289793/gotevexolulesex_wedexaxifak_moluzup.pdf
    • http://syracusenyapartmentrentals.com/uploads/1/3/0/8/130813063/zamig-lujepubuwomule.pdf
    • http://remarkablecanine.com/uploads/1/3/0/9/130969758/62e5b69a75df.pdf
    • http://jeanfrancoismanzoni.com/uploads/1/3/1/4/131438784/mewukoji-duwiwu.pdf
    • http://steerchipz.com/uploads/1/3/0/5/130590026/3860177.pdf
    • http://ellingtonconsultations.com/uploads/1/3/1/1/131164110/9569066.pdf
    • http://savebetito.com/uploads/1/3/0/8/130814234/zipufi.pdf
    • http://collegeprepsavings.com/uploads/1/3/1/3/131398184/2730278.pdf
    • http://danaleanne.com/uploads/1/3/1/0/131070971/e306d02f.pdf
    • http://charlesaheiner.com/uploads/1/3/0/8/130813606/palujeroxod.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_off00005750.bin
23d676af68b4c340b926cac6b5e2e38c640648de3003bd82a091b2c7adefe577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5750 6972 bytes

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