Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbef8e10f581870…

MALICIOUS

PDF

42.1 KB Created: 2020-04-02 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d68fffc0f3415d68c6668d981cd0f373 SHA-1: 98fee3c3aef92620f21a5396fbb7b01fb281d5af SHA-256: 1dbef8e10f58187027e1a9e3049219f98c1a5e6b7bb41e6e3f4bb82895e45fbb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the PDF structure and the sheer volume of outbound links suggest a malicious intent to drive traffic to potentially harmful 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://vinnyshomeinspections.net/uploads/1/3/0/8/130874614/130874614.html#desarrollo+psicologico+libro
    • http://bayarea-interactivehypnotherapy.org/uploads/1/3/0/6/130639873/5e766d9c.pdf
    • http://mypriceinsurance.com/uploads/1/3/0/2/130288932/ziroxupapumokibumegi.pdf
    • http://edwardsautomotivemillingandi.com/uploads/1/3/0/5/130539881/vovukekakutif.pdf
    • http://hellolovelylifestyle.com/uploads/1/3/0/4/130435914/c98868f147.pdf
    • http://1300998887.com/uploads/1/3/1/4/131438161/lurafawakeka.pdf
    • http://thebelledesigngroup.com/uploads/1/3/0/7/130740165/benanevubofup.pdf
    • http://flameglory.com/uploads/1/3/1/1/131164130/sasuwetovatupipu.pdf
    • http://bluebearrepairs.com/uploads/1/3/0/5/130588961/dawum_matoveto.pdf
    • http://mx.circlecitycrystals.com/uploads/1/3/0/7/130740465/kesalaj-diwirakokeraxaz-dolaluzurozu.pdf
    • http://calebwolfemusic.com/uploads/1/3/0/6/130603983/nunogewiranupi-guzitit-ziwina-wasobubodivewo.pdf
    • http://misskathleens.com/uploads/1/3/0/4/130436224/bf5cc3429b66090.pdf
    • http://findmypuppynj.com/uploads/1/3/0/3/130313836/6874ec867a479e.pdf
    • http://greatpelican.com/uploads/1/3/1/3/131381044/meregubedof.pdf
    • http://kiterunneranalysis.com/uploads/1/3/0/5/130588548/nanaxurekita-sokelolofonobeb.pdf
    • http://walnutcreekfencing.com/uploads/1/3/0/4/130436020/87bc4cc49c13.pdf
    • http://torrentphysicaltherapy.com/uploads/1/3/1/4/131438778/8291343.pdf
    • http://scalesnwhitetails.com/uploads/1/3/0/4/130435710/225ad.pdf
    • http://nuneatcabins.com/uploads/1/3/1/3/131380983/111de.pdf
    • http://whynotnowmovement.org/uploads/1/3/0/6/130620728/dorina_jumugavaxepef_tujasemijagatip.pdf
    • http://eflsignes.com/uploads/1/3/0/6/130604117/9765753.pdf
    • http://qmaccapital.com/uploads/1/3/0/7/130738636/vikixurekojufonusita.pdf
    • http://archaeonotes.org/uploads/1/3/0/6/130620506/6011397.pdf
    • http://empoweredlegends.com/uploads/1/3/0/9/130969280/gasorowegobone.pdf
    • http://elizabethbaileyportraits.com/uploads/1/3/0/4/130483443/juwomemejure.pdf
    • http://expertaenvaciones.com/uploads/1/3/0/4/130435682/fumivupevupizarog.pdf
    • http://empoweredlegends.com/uploads/1/3/0/9/1309
    • 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_off00007901.bin
69a27877961fd3b05da32a24336b1946415c063eeef541add11a905f065bffaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 8828 bytes

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