Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc33905b2d9d41e…

MALICIOUS

PDF

40.3 KB Created: 2020-04-01 20:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9e04428d6db6c6a25ea3acbaf4e37cb SHA-1: 9e3ee5704a49cde5cd796e549c8df0a68b92325c SHA-256: 7dc33905b2d9d41efdefa3edf61cf22b9450f838a794883e26af75436e1c8ef3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a common technique for SEO poisoning or phishing lures. The 'PDF_SEO_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm, likely to direct users to malicious content or to manipulate search engine rankings. The embedded URLs and the document body text suggest a pretext of providing information, while the actual intent is to drive traffic to potentially harmful external 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://annotalegal.com/uploads/1/3/1/4/131455508/131455508.html#information+storage+and+management+2nd+edition+pdf
    • http://tatysbling.com/uploads/1/3/0/5/130590663/4728050.pdf
    • http://andrewsmithofficial.com/uploads/1/3/0/5/130551343/puritefozegofawugega.pdf
    • http://saraandrewswriting.com/uploads/1/3/0/7/130740562/9856452.pdf
    • http://johnthomsbehaviormethod.com/uploads/1/3/1/0/131070652/doroxal_gulukugesug_jefemixuv_lolako.pdf
    • http://rorros.net/uploads/1/3/1/3/131384713/velezo.pdf
    • http://laurenthomerepairs.com/uploads/1/3/0/7/130740049/nikevegapulibaze.pdf
    • http://somethinghoppy.com/uploads/1/3/1/1/131164442/6404863.pdf
    • http://ladygirlcustom.net/uploads/1/3/0/6/130603965/8877223.pdf
    • http://hadialqazwini.com/uploads/1/3/0/4/130476976/bibisogabog.pdf
    • http://aquapropressurewashing.net/uploads/1/3/1/1/131164187/ea76c9774e.pdf
    • http://wanderingtrailsflowers.com/uploads/1/3/0/7/130776138/baxipunitaxabadoz.pdf
    • http://wc1usd.com/uploads/1/3/0/5/130590538/pakozowugedakekejibe.pdf
    • http://ophsclassof1999.com/uploads/1/3/0/6/130639892/vitisu_kinawajutu.pdf
    • http://heart-and-soul-therapy.com/uploads/1/3/0/6/130620475/7085230.pdf
    • http://fldfamilylaw.com/uploads/1/3/0/6/130620758/zasirilifopifuni.pdf
    • http://mohannadgharaibeh.com/uploads/1/3/0/5/130550778/juwukumizojutebag.pdf
    • http://adri.space/uploads/1/3/0/3/130324164/kuruxewubapabov-xafulegagurun-pizojikalafazow.pdf
    • http://meadowuniversity.com/uploads/1/3/0/8/130814877/mamugumusiko.pdf
    • http://de.janrosenow.com/uploads/1/3/0/7/130776555/7199660.pdf
    • http://christinamhs.com/uploads/1/3/0/5/130544889/xoruzazifujoru_xobupeb.pdf
    • http://millscellanees.com/uploads/1/3/0/5/130540359/1eae2d113723.pdf
    • http://mountainviewbistro.com/uploads/1/3/0/3/130323406/gimexur_sidag_finilajolo_kazuruz.pdf
    • http://celebritytutoring.com/uploads/1/3/0/8/130813658/rowajo_tarexi_gefexire_levetixipiwejog.pdf
    • http://celebritytutoring.com/uploads/1/3/0/8/
    • 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_off00007512.bin
99f08c3594d564ba52ae06846871091ef5a5b62197f7ee1709040e9d333d4ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 7700 bytes

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