Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e91d9e4a5d35092…

MALICIOUS

PDF

45.7 KB Created: 2020-03-25 08:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2e7983acb905db3272a9522ec157a057 SHA-1: b1f0e70da0f1cd93a2268e37036051f705f9babc SHA-256: 3e91d9e4a5d35092f182a835a9a69f0d511810d0213bc21ea284ac990d4c9f6c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of this link network. The primary intent appears to be directing users to a network of websites, likely for malicious purposes such as hosting further exploits or phishing 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://makingmoneywhileyousleep.us/uploads/1/3/0/2/130291416/130291416.html#que+es+un+creativo+digital
    • http://juneau-dining.com/uploads/1/3/0/4/130475996/7444886.pdf
    • http://naileddailycom.com/uploads/1/3/0/6/130640071/727b525feed39.pdf
    • http://onemoment.co/uploads/1/3/0/5/130539518/2341278.pdf
    • http://claytonchapinportfolio.com/uploads/1/3/0/2/130287504/7530593.pdf
    • http://campuscrowd.in/uploads/1/3/0/4/130476469/740ba9300.pdf
    • http://moldaufamily.com/uploads/1/3/0/7/130740251/2878277.pdf
    • http://almostprohockey.ca/uploads/1/3/0/7/130776351/7187795.pdf
    • http://www.civvisavvi.com/uploads/1/3/0/7/130738892/6312085.pdf
    • http://thepositivepatientexperience.com/uploads/1/3/0/5/130589399/152720.pdf
    • http://lionelcallender.com/uploads/1/3/0/3/130379371/6271d01f28ae.pdf
    • http://mycityadd.com/uploads/1/3/0/3/130323672/7661463.pdf
    • http://www.pnfccwi.com/uploads/1/3/0/2/130291463/rebilotevatowusinaf.pdf
    • http://mail.sandblast-arts.org/uploads/1/3/0/5/130589061/bb169ef3fa0f0.pdf
    • http://doctorluisfelipe.com/uploads/1/3/0/2/130271048/weragumex-vukametilo-wenumejuluwigol.pdf
    • http://mermaidsranch.com/uploads/1/3/0/4/130483564/6002ce47aef69.pdf
    • http://onhorn.com/uploads/1/3/0/5/130539899/wirot.pdf
    • http://doublehranch.ca/uploads/1/3/0/5/130544243/4ce65.pdf
    • http://krusefamilylaw.net/uploads/1/3/0/3/130313378/fexerurekife-jisofepulepuga-bukawajuno.pdf
    • http://xpdxl.bpmtc.com/uploads/1/3/0/5/130588864/gevoxiresixonumabadu.pdf
    • http://www.nyingma-summer-seminar.com/uploads/1/3/0/4/130475932/5943255.pdf
    • http://chromationspec.com/uploads/1/3/0/3/130379061/3e260dfc38271b5.pdf
    • http://medarsolution.com/uploads/1/3/0/3/130324037/wefubowonuri_loramemazepador_mumivatupaxa_bowerazo.pdf
    • http://enclaveconnection.com/uploads/1/3/0/5/130590200/294a8fd119819.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_off0000871f.bin
09a76389510299b64299ccf373a5d95a8bf7727710e65efbbc9fb6b20eccc2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 8920 bytes

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