Malicious PDF — malware analysis report

Static analysis result for SHA-256 60077d2770eafb31…

MALICIOUS

PDF

42.8 KB Created: 2020-04-03 06:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aff343f8c7a7689e6e2fad6a81f789c2 SHA-1: b32a09e6279cbf1d5bf62c7bd4bc8cab6abcaa73 SHA-256: 60077d2770eafb3119d01d3e3a036f1835d9e9c9dd5893e849c3ae2582e1a607
136 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 point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or a method to distribute malicious content under the guise of legitimate documents. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous generated URLs supports this assessment. No scripts were extracted, but the link farm itself is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://edwardfanphotos.com/uploads/1/3/0/7/130775498/130775498.html#digital+watchdog+vmax+a1+manual
    • http://neotribes.org/uploads/1/3/1/4/131406688/9689a33f46ec9.pdf
    • http://bbeboutiquellc.com/uploads/1/3/0/9/130969521/2160711.pdf
    • http://iftardeals.com/uploads/1/3/0/5/130539696/5962512.pdf
    • http://unumcapital.org/uploads/1/3/0/8/130874233/fizefifinid_gawegimozono_burulebija.pdf
    • http://connectedcommunicationsconsultants.com/uploads/1/3/0/7/130740259/4343751.pdf
    • http://omarasensio.com/uploads/1/3/0/7/130740522/rikalebejuwazi.pdf
    • http://junetranmer.com/uploads/1/3/0/4/130476976/6fbcb00499.pdf
    • http://band-ems.org/uploads/1/3/1/4/131406270/lexizaxira.pdf
    • http://idahofallshandyman.net/uploads/1/3/0/7/130776692/c1e75d807313.pdf
    • http://jessicakissingerartistry.com/uploads/1/3/0/7/130775163/dololoruratixu.pdf
    • http://principalgneely.com/uploads/1/3/0/6/130604934/fuwonagosuka_sudixutalu.pdf
    • http://evolving8enterprises.com/uploads/1/3/0/5/130589413/2400b3b9e1.pdf
    • http://njusic.net/uploads/1/3/0/5/130590698/11011ed667b584.pdf
    • http://timjohnsonrealtor.com/uploads/1/3/0/7/130776246/ad51e3c7246d977.pdf
    • http://dogfriendlyphx.com/uploads/1/3/0/4/130435902/rekozexuvafafi_gozeze.pdf
    • http://sbaorg.org/uploads/1/3/0/6/130620859/fizex.pdf
    • http://bigcseo.com/uploads/1/3/0/6/130620657/4443681.pdf
    • http://windustriesonline.com/uploads/1/3/0/7/130775531/vizel.pdf
    • http://dreleam.com/uploads/1/3/0/8/130814448/rigopiwekamej_lejimoz_sikitenopupuw_fexitegokureb.pdf
    • http://lavidamia-miami.com/uploads/1/3/0/4/130476878/fedisoxuwi_vomanidusudadew_wekagetazobon_xowerupavukedo.pdf
    • http://norshus.com/uploads/1/3/0/4/130488252/ad3f85b9e3.pdf
    • http://lesesirkeln.org/uploads/1/3/0/5/130550738/zisuxevuguxal.pdf
    • http://astylemag.com/uploads/1/3/1/0/131070187/lozel_rofokobel_fenosetu_vupogebofabas.pdf
    • http://shaunbuggs.com/uploads/1/3/0/6/130604222/kedonaxumilav.pdf
    • http://life2art.shop/uploads/1/3/0/5/130541186/1b0ab1ec8f.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_off00007b2f.bin
1998ad01b7d2c2cceb6e1588103f9cd1045db6a237a20f8374ec1f5831122c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F 9068 bytes

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