Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d0c6f14da54023…

MALICIOUS

PDF

42.5 KB Created: 2020-03-25 11:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d78b8e8f19e83e2f2e60d8b86c674098 SHA-1: 5f0fea92318048e444803b057592738d2a083a14 SHA-256: f2d0c6f14da540232a607ed928a1d055fdc84a2def52a2c1144259be7bb8b1f6
94 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm. The document body, though partially corrupted, contains references to URLs that are also present in the extracted URL list. The primary function appears to be directing users to a multitude of other PDF documents hosted across various domains, potentially for SEO manipulation or to serve as a distribution point for further malicious content.

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://acousticfloydtribute.com/uploads/1/3/0/5/130545001/130545001.html#que+el+periodico+y+sus+partes
    • http://soyseal.com/uploads/1/3/0/4/130435762/77b52.pdf
    • http://stcaucus.org/uploads/1/3/0/3/130323154/debun.pdf
    • http://www.curvybridenh.com/uploads/1/3/0/5/130589452/2958688.pdf
    • http://katherine-blanchard.com/uploads/1/3/0/6/130604956/mubunegavasame.pdf
    • http://ladyboner.net/uploads/1/3/0/6/130620449/zufavopemera.pdf
    • http://hostmaster.mypensionpal.co.uk/uploads/1/3/0/9/130969205/vojobazakule.pdf
    • http://naturaphysicaltherapy.com/uploads/1/3/0/2/130288626/3206476.pdf
    • http://foothillsfamiliesandfaith.com/uploads/1/3/0/5/130589416/6ecdd21f30e.pdf
    • http://fortalezzalegal.com/uploads/1/3/0/6/130639751/66fd12123cb.pdf
    • http://crescentwholehealth.com/uploads/1/3/0/6/130605403/rewefoku.pdf
    • http://muzoesmeraldas.com/uploads/1/3/0/4/130483866/ef991c7.pdf
    • http://innovationlifecenter2.org/uploads/1/3/0/4/130483132/2ab9fa.pdf
    • http://soletrain5k.com/uploads/1/3/0/6/130605462/guwuwo.pdf
    • http://hostmaster.donspampinato.co.uk/uploads/1/3/0/6/130604902/9604565.pdf
    • http://hiddenriverwholesale.com/uploads/1/3/0/6/130639708/f70ddc86af596a.pdf
    • http://www.lapanalista.com/uploads/1/3/0/4/130489241/wuted.pdf
    • http://imaginaryrats.org/uploads/1/3/0/7/130776394/demonuzometegig.pdf
    • http://bjornwennerwald.com/uploads/1/3/0/5/130589050/9589005.pdf
    • http://marlagoldbergart.com/uploads/1/3/0/6/130621593/9532369.pdf
    • http://skyleslawfirm.com/uploads/1/3/0/6/130604359/gitututegubus.pdf
    • http://metallicblackrecords.com/uploads/1/3/0/2/130287915/2838825.pdf
    • http://morrisseauartist.com/uploads/1/3/0/7/130775181/2488810.pdf
    • http://knxbeats.com/uploads/1/3/0/5/130590008/zudilukipale.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_off00007cc2.bin
9c5de9bd06706a63263e3753943e6cc9dd12079881ee08d03e8e0f0d7817816a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC2 8312 bytes

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