Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1a1b0fafe93130…

MALICIOUS

PDF

42.8 KB Created: 2020-03-21 18:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 07eb5878102be4f73b998a4e3507a966 SHA-1: a8c936797a92d381fc442d5e23c6554cabcf4e76 SHA-256: 2f1a1b0fafe931309e3064cb3bf4f7849f08ee1886b182fe1718af568f49af7f
94 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains garbled text along with a URL that appears to be part of this link farm. The primary function appears to be directing users to a large collection of other PDFs, potentially for SEO spam or to host 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://adventureinstincts.com/uploads/1/3/0/6/130639571/130639571.html#ischemia+right+lower+extremity+icd+10
    • http://www.philipgilliverauthor.com/uploads/1/3/0/7/130739298/naberizenere.pdf
    • http://kmepc.net/uploads/1/3/0/4/130476085/kidigunu.pdf
    • http://bluewaternrhs.org/uploads/1/3/0/2/130289655/fomosare.pdf
    • http://davizo.com/uploads/1/3/0/7/130776885/29a5ad5.pdf
    • http://raleighoffice.net/uploads/1/3/0/6/130605462/tebimarivujuru.pdf
    • http://timbertracehomeinspections.com/uploads/1/3/0/6/130620427/rilur_fefofoburoto_desawonuwo.pdf
    • http://www.brianpank.com/uploads/1/3/0/7/130740127/1596434.pdf
    • http://shelbymaeedwards.com/uploads/1/3/0/2/130291030/9730317.pdf
    • http://willostudio.com/uploads/1/3/0/8/130814907/7700718.pdf
    • http://ashleerenae.com/uploads/1/3/0/5/130539295/3537226.pdf
    • http://berryplasticsmanufacturinganddistributionfacility.com/uploads/1/3/0/6/130621155/diwotej-deraxexiref-sexogimasaladu-ginajeluveroxef.pdf
    • http://maseveconsulting.com/uploads/1/3/0/2/130271124/tegesego.pdf
    • http://jesusonprophecy.org/uploads/1/3/0/4/130478760/4abe8757bd.pdf
    • http://asapusedcars.com/uploads/1/3/0/6/130620948/5564531.pdf
    • http://docpixelphotography.com/uploads/1/3/0/4/130489162/8911983.pdf
    • http://natationlaval.com/uploads/1/3/0/7/130739235/nisote.pdf
    • http://www.my-cotec.com/uploads/1/3/0/6/130640225/zezuvupexep.pdf
    • http://mrgrantmath.com/uploads/1/3/0/5/130551429/kafomimoz-tarokenej-girede-xuruduvabomu.pdf
    • http://sonomacountypickleball.com/uploads/1/3/0/7/130739212/zuposezekevebuk.pdf
    • http://camillecharlyart.com/uploads/1/3/0/6/130603838/suwowubu.pdf
    • http://bestonsaleprices.com/uploads/1/3/0/6/130621059/faregidikupegasodev.pdf
    • http://novamedia.dk/uploads/1/3/0/5/130590550/5565099.pdf
    • http://www.qragency.co.uk/uploads/1/3/0/6/130605133/dagonoda.pdf
    • http://www.catholicsocialteaching-bullying.com/uploads/1/3/0/3/130323647/gilivope.pdf
    • http://www.catholicsocialteaching-bullyi
    • 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_off00007fda.bin
6ae059fbce9421b79957e5dff99165880e03480df6ebebc04bc117392084e1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 7660 bytes

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