Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1ed695f28dbe59…

MALICIOUS

PDF

40.8 KB Created: 2020-04-03 11:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2333ff3d914993c4992aa2bc94945cf5 SHA-1: 2eb6aa34405b0c468e1c29a1ede7b0663db73f79 SHA-256: 9f1ed695f28dbe593e64958e3d16af159e6d210cd9e55df7489c98d094d6a8d4
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a Spanish phrase related to public health plans and references the wkhtmltopdf tool. The primary function appears to be directing users to a vast array of other PDF documents hosted on numerous domains, suggesting a link farm or distribution mechanism for further malicious 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://fitzgeraldsolutionsllc.com/uploads/1/3/0/6/130604269/130604269.html#el+plan+decenal+de+salud+p%C3%BAblica+tiene+los+siguientes+objetivos
    • http://themountainforge.com/uploads/1/3/0/7/130775198/mawuredifavumi.pdf
    • http://solutionbooklet.com/uploads/1/3/0/5/130539427/tudidinanemasimule.pdf
    • http://plainfieldbusinesscenter2.com/uploads/1/3/0/9/130969659/farovepepedijur.pdf
    • http://genuinedesignsolutions.com/uploads/1/3/0/7/130739222/493a1d90685.pdf
    • http://medpulsenj.com/uploads/1/3/1/3/131384211/94ac12.pdf
    • http://prettygirlz.org/uploads/1/3/1/4/131408942/fulone-dipozima.pdf
    • http://msjohnsonscienceclass.com/uploads/1/3/0/7/130739970/b701c832e28a2f7.pdf
    • http://sonenalp.com/uploads/1/3/0/2/130273798/1419515.pdf
    • http://gimeproductions.com/uploads/1/3/0/2/130291040/xerudidavap.pdf
    • http://leahmillerfreeman.com/uploads/1/3/0/5/130551086/josofukuziwasutu.pdf
    • http://beatacademics.com/uploads/1/3/0/4/130483402/6006272.pdf
    • http://sandytalarmo.com/uploads/1/3/0/7/130774978/7620962.pdf
    • http://nckl.solutions/uploads/1/3/0/6/130639077/gozobaderipofamosunu.pdf
    • http://ellisflemingltd.com/uploads/1/3/0/5/130550901/zorukafewaxewume.pdf
    • http://midamericacongregationallife.org/uploads/1/3/0/9/130969942/6b83fc3fb4.pdf
    • http://niftynegro.com/uploads/1/3/0/8/130874162/5bf40d110.pdf
    • http://stunningchina.com/uploads/1/3/1/0/131070098/rezojedizege-rukulimuwasega-paxuxotarosulaj-gazeti.pdf
    • http://pursesnatched.com/uploads/1/3/0/7/130740205/1341664.pdf
    • http://prismismstudios.com/uploads/1/3/0/6/130603931/kiriverotaruso.pdf
    • http://spiritsdogs.com/uploads/1/3/0/5/130589281/2109049.pdf
    • http://donnatodelao.net/uploads/1/3/0/6/130604905/jikobadomumik.pdf
    • http://baytodayrealty.com/uploads/1/3/0/5/130544541/kujiwux.pdf
    • http://alohaspiritlomilomi.com/uploads/1/3/0/5/130544147/9868923.pdf
    • http://feedthejoy.com/uploads/1/3/0/5/130551046/75cf8b2f.pdf
    • http://ambertripodi.com/uploads/1/3/0/7/130740376/da2c82607831.pdf
    • http://alohaspiritlomilomi.com/uploads/1/3/0/5/130544147/986892
    • 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_off00007481.bin
edb713ecafcd467dfc5d032feb2cf7c80f8879be7b4e7d65f7905a4668dd61e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 7860 bytes

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