Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dfec57c8b61023…

MALICIOUS

PDF

46.7 KB Created: 2020-03-14 19:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ffe6845f06383f424a9e4ac65471e8b SHA-1: 3bddddee3b621c5a5f3bf54d8915491115d48c4f SHA-256: e1dfec57c8b61023853abd93c01090b6009dbd804017a6a4aa63c0a1834add7c
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs point to various PDF files hosted on different domains, suggesting a coordinated effort to redirect users to potentially harmful sites.

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://crowntresseshair.net/uploads/1/3/0/7/130739122/130739122.html#mcent+browser+app++for+pc
    • http://kosovapharm.com/uploads/1/3/0/8/130873902/dafukivod.pdf
    • http://midatlanticbowl.com/uploads/1/3/0/3/130313612/bexuso.pdf
    • http://lenaclare.com/uploads/1/3/0/7/130775707/zepojabokijedo.pdf
    • http://cpanel.tatyanashealthblog.com/uploads/1/3/0/8/130814439/6794223.pdf
    • http://mgeducationfund.org/uploads/1/3/0/5/130590356/b2cc2.pdf
    • http://www.highaspirations.org.uk/uploads/1/3/0/5/130588231/kosekalabawexanu.pdf
    • http://delarosacreations.net/uploads/1/3/0/5/130551687/b0654e980e.pdf
    • http://www.humanistcast.com/uploads/1/3/0/7/130739680/8344621.pdf
    • http://memphiscricketcup.com/uploads/1/3/0/8/130813798/jopinutaferux.pdf
    • http://robinson.daniellerosephotography.com/uploads/1/3/0/4/130483928/vebini_bafupinebulo_duzaramejineroz.pdf
    • http://ocmunc.com/uploads/1/3/0/8/130813669/4168669.pdf
    • http://www.iron-peptides.com/uploads/1/3/0/3/130379167/8388947.pdf
    • http://summercampdiary.com/uploads/1/3/0/6/130639781/vanudosufatutibovis.pdf
    • http://www.tejascamo.com/uploads/1/3/0/8/130813400/c610e51c.pdf
    • http://pictotrack.com/uploads/1/3/0/8/130813548/zofeturur.pdf
    • http://mccormack-development.com/uploads/1/3/0/7/130776514/gumotelode.pdf
    • http://allthis.org/uploads/1/3/0/4/130436165/aca4c8e3035d4.pdf
    • http://pdstudios.net/uploads/1/3/0/3/130313196/raxafimekaw-tipakup-fubinovuzezes-rawer.pdf
    • http://lavenderbodyworksllc.com/uploads/1/3/0/7/130740060/babanobep.pdf
    • http://brdpllc.com/uploads/1/3/0/2/130272994/kowoboguxiju-pogosud.pdf
    • http://lane8gamingstudio.com/uploads/1/3/0/6/130604539/jeziv-nukedizifututa-farofobelibaz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ed.bin
8d4d9fd9ae16bb9f17099e820bffedce5f69792c45be72b50112640931c15317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 8548 bytes
font_01_sfnt_off000094ac.bin
07c73be30eb34948e74f52f70ebe7fddcf8d7968b2f44a68d1202150632f322e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94AC 16444 bytes

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