Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1a39a61a43965c…

MALICIOUS

PDF

38.1 KB Created: 2020-04-02 23:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 96ca3dbe6604375729e0badd4f8db577 SHA-1: 463e9a2231a1aff7d5e9cac7d1c39faf0af377cf SHA-256: 6b1a39a61a43965c5a1fa4112d8550d26492ff75d6d7aaf6e3b6443f4e344768
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, which is a common technique for SEO poisoning or distributing malware. The document body mentions 'Serial code for sims 3', suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicates 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://keatingphysicaltherapy.net/uploads/1/3/0/6/130620653/130620653.html#serial+code+for+sims+3
    • http://thebutternutbeat.com/uploads/1/3/0/9/130969214/9368156.pdf
    • http://ohioriverdriftwood.com/uploads/1/3/0/8/130814729/purokofoz.pdf
    • http://www.qslclasses.com/uploads/1/3/0/9/130969407/489fbff8.pdf
    • http://destinycoach.com/uploads/1/3/0/7/130776695/gotanivira-lavesazex-vojisika.pdf
    • http://booksbitchesandbeyond.com/uploads/1/3/0/5/130539340/jererusinutudezop.pdf
    • http://libraryofbeauty.com/uploads/1/3/0/7/130740232/f16a469b8.pdf
    • http://ns1.vmrs.org/uploads/1/3/0/7/130738939/460fb.pdf
    • http://listeningemporium.com/uploads/1/3/0/6/130621342/gidenudanevonijew.pdf
    • http://newacunit.store/uploads/1/3/0/3/130323814/460e2c78a2a9923.pdf
    • http://xinnature.org/uploads/1/3/0/6/130620667/bcff7f71be664b.pdf
    • http://sarasellshomes.net/uploads/1/3/0/4/130491008/gavotejulozab_xuvagikepu_zuxudofapelera_gujudabaka.pdf
    • http://motortour.online/uploads/1/3/1/3/131398423/zowakupog_risigot.pdf
    • http://sportsmogul.net/uploads/1/3/0/5/130544118/64e25c5c36.pdf
    • http://isaiahsixeight.org/uploads/1/3/0/3/130313141/vuzedejijiv.pdf
    • http://intellitaxpros.com/uploads/1/3/1/3/131398264/60eb9d110edb8d6.pdf
    • http://www.oaklandempowermentscholarshipprogram.com/uploads/1/3/0/6/130604154/nilegifunifuxut.pdf
    • http://thejesusphilosophy.com/uploads/1/3/0/5/130590665/mokalipegixoxusuz.pdf
    • http://portl.org/uploads/1/3/0/7/130775819/7266f876c23.pdf
    • http://techgearcases.com/uploads/1/3/0/5/130551219/jimikufasede.pdf
    • http://prettylittlenurse.com/uploads/1/3/0/7/130775103/toweso.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f75.bin
1e0b826f7439d638fae25250a320076d9b60bcbc6c5e2f8fe33fdc5dbc188179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 7932 bytes
font_01_sfnt_off00007e02.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 4144 bytes

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