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) First seen: 2020-09-24
MD5: e9e04428d6db6c6a25ea3acbaf4e37cb SHA-1: 9e3ee5704a49cde5cd796e549c8df0a68b92325c SHA-256: 7dc33905b2d9d41efdefa3edf61cf22b9450f838a794883e26af75436e1c8ef3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which appear to be dynamically generated and point to other PDF files. This behavior is indicative of a link farm or SEO poisoning technique, likely intended to direct users to malicious content or facilitate the download of further malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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 PDF link annotation
    • http://tatysbling.com/uploads/1/3/0/5/130590663/4728050.pdfIn PDF document text
    • http://andrewsmithofficial.com/uploads/1/3/0/5/130551343/puritefozegofawugega.pdfIn PDF document text
    • http://saraandrewswriting.com/uploads/1/3/0/7/130740562/9856452.pdfIn PDF document text
    • http://johnthomsbehaviormethod.com/uploads/1/3/1/0/131070652/doroxal_gulukugesug_jefemixuv_lolako.pdfIn PDF document text
    • http://rorros.net/uploads/1/3/1/3/131384713/velezo.pdfIn PDF document text
    • http://laurenthomerepairs.com/uploads/1/3/0/7/130740049/nikevegapulibaze.pdfIn PDF document text
    • http://somethinghoppy.com/uploads/1/3/1/1/131164442/6404863.pdfIn PDF document text
    • http://ladygirlcustom.net/uploads/1/3/0/6/130603965/8877223.pdfIn PDF document text
    • http://hadialqazwini.com/uploads/1/3/0/4/130476976/bibisogabog.pdfIn PDF document text
    • http://aquapropressurewashing.net/uploads/1/3/1/1/131164187/ea76c9774e.pdfIn PDF document text
    • http://wanderingtrailsflowers.com/uploads/1/3/0/7/130776138/baxipunitaxabadoz.pdfIn PDF document text
    • http://wc1usd.com/uploads/1/3/0/5/130590538/pakozowugedakekejibe.pdfIn PDF document text
    • http://ophsclassof1999.com/uploads/1/3/0/6/130639892/vitisu_kinawajutu.pdfIn PDF document text
    • http://heart-and-soul-therapy.com/uploads/1/3/0/6/130620475/7085230.pdfIn PDF document text
    • http://fldfamilylaw.com/uploads/1/3/0/6/130620758/zasirilifopifuni.pdfIn PDF document text
    • http://mohannadgharaibeh.com/uploads/1/3/0/5/130550778/juwukumizojutebag.pdfIn PDF document text
    • http://adri.space/uploads/1/3/0/3/130324164/kuruxewubapabov-xafulegagurun-pizojikalafazow.pdfIn PDF document text
    • http://meadowuniversity.com/uploads/1/3/0/8/130814877/mamugumusiko.pdfIn PDF document text
    • http://de.janrosenow.com/uploads/1/3/0/7/130776555/7199660.pdfIn PDF document text
    • http://christinamhs.com/uploads/1/3/0/5/130544889/xoruzazifujoru_xobupeb.pdfIn PDF document text
    • http://millscellanees.com/uploads/1/3/0/5/130540359/1eae2d113723.pdfIn PDF document text
    • http://mountainviewbistro.com/uploads/1/3/0/3/130323406/gimexur_sidag_finilajolo_kazuruz.pdfIn PDF document text
    • http://celebritytutoring.com/uploads/1/3/0/8/130813658/rowajo_tarexi_gefexire_levetixipiwejog.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
🗂 Part of campaign: laurenthomerepairs.com 3 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7512 7700 bytes
SHA-256: 99f08c3594d564ba52ae06846871091ef5a5b62197f7ee1709040e9d333d4ea5

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