Malicious PDF — malware analysis report

Static analysis result for SHA-256 9885ddad3f7466ff…

MALICIOUS

PDF

39.0 KB Created: 2020-05-14 08:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d5930d41e4fe98217ffbbc332b65c897 SHA-1: 997cc11e6be8754a91f395b1d9317e23cfd9e41c SHA-256: 9885ddad3f7466ff4d40880102d2a5d4b8a42d785ba6f69f08397f0950152724
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, identified as a PDF_SEO_LINK_FARM heuristic. The document body text is garbled but contains a URL that is also present in the list of external links. The primary purpose appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://opssecurityagency.com/uploads/1/3/0/4/130476943/130476943.html#chahun+main+ya+naa+female+song
    • http://adventureoutpostsurvivalbags.com/uploads/1/3/0/5/130539247/5986068.pdf
    • http://mplusjclothing.org/uploads/1/3/1/0/131070938/8236423.pdf
    • http://ez360apps.com/uploads/1/3/1/4/131437330/bf8bb7bacfa.pdf
    • http://thecrystalnexus.com/uploads/1/3/0/4/130483634/gamudok.pdf
    • http://farmhousekitchenferments.com/uploads/1/3/1/4/131452836/nikixipira_wufuwi_wazabirebidiveg.pdf
    • http://tormentasdeverano.com/uploads/1/3/0/9/130969183/3636610.pdf
    • http://talentedspeakersbureau.com/uploads/1/3/0/6/130604881/dumemupopufegixako.pdf
    • http://nicewerk.com/uploads/1/3/0/7/130738633/8e7917c.pdf
    • http://people2peopleinc.org/uploads/1/3/0/6/130604962/puporox.pdf
    • http://themarketingmuggles.com/uploads/1/3/0/2/130288456/kasepexora.pdf
    • http://concordcbf.com/uploads/1/3/0/4/130491322/dcd84c516441.pdf
    • http://sandyspringsdivorcelawyers.com/uploads/1/3/0/9/130968979/jofetowema_gisurulujepib_zokatax_zilomok.pdf
    • http://goldstardjny.com/uploads/1/3/1/3/131383854/10a1431425.pdf
    • http://tierlihuus.shop/uploads/1/3/1/4/131407798/guwipuxulipojipotaj.pdf
    • http://juliaschwentor.com/uploads/1/3/0/4/130488223/xokivarabukopi-tamofujofiza-rerosutoduvile-sazijovezular.pdf
    • http://nmawhc.org/uploads/1/3/1/0/131071082/goviravik_pavar.pdf
    • http://donjongamingtavern.com/uploads/1/3/1/6/131606938/kupopozetirumi.pdf
    • http://nicolemfraley.com/uploads/1/3/1/4/131406286/xapulapati.pdf
    • http://bohemianattic.com/uploads/1/3/0/2/130288444/zawenob_lusesule_bewuxawu.pdf
    • http://pinecreekinnutah.com/uploads/1/3/0/7/130739974/3173009.pdf
    • http://toniandmatthew.com/uploads/1/3/0/4/130477979/0ddeae4e30674cf.pdf
    • http://kingfisher-strategy.com/uploads/1/3/1/4/131452950/popavariz_vajepej.pdf
    • http://muskmeloncreative.com/uploads/1/3/0/2/130272892/4890918.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_off00006d48.bin
e67f62f3526e48ce613d1decc4b2b0d345bd04c1f2e05c96e3c344a6cbe01055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 10184 bytes

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