Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaad828828ff3076…

MALICIOUS

PDF

38.4 KB Created: 2020-03-26 14:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: efcec3252534e77575d37d64645bce7a SHA-1: e2b0579f27d2bfb4e71bed6c69911019a1aa9720 SHA-256: aaad828828ff30763014cb822cd1ed999c5fe14ac15e14800e03ad366c3fe7b4
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains references to URLs that point to other PDF files hosted on various domains. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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://sixtarubio.com/uploads/1/3/0/7/130775052/130775052.html#seadoo+shop+manual
    • http://wildcherryog.com/uploads/1/3/0/6/130621498/535eb4af.pdf
    • http://irc4hr.net/uploads/1/3/0/8/130813732/8d448beeb5f3.pdf
    • http://synergymedicalspecialists.com/uploads/1/3/0/7/130776676/ef19c9d.pdf
    • http://www.skinfitnessretreat.com/uploads/1/3/0/2/130270979/wofidatumal_disatena_lirat.pdf
    • http://imaginethatdigistamp.com/uploads/1/3/0/4/130476171/1864916.pdf
    • http://commstech-hub.eisf.eu/uploads/1/3/0/5/130588962/xusakuwifawu-gepofijebarojo-nugovumedura.pdf
    • http://paradigmclothing.shop/uploads/1/3/0/5/130539108/3614655.pdf
    • http://hostmaster.rangebourne-pets.co.uk/uploads/1/3/0/2/130270942/mobunutusedewud-ruroz-wipano-jejozuk.pdf
    • http://www.illoso.com/uploads/1/3/0/7/130776571/9039525.pdf
    • http://rtocycles.com/uploads/1/3/0/5/130551524/tukenelowav_nugavegaruz_zetunobosuzuluv.pdf
    • http://chocolatecsa.com/uploads/1/3/0/5/130550785/pirusujiketo.pdf
    • http://preachersays.com/uploads/1/3/0/5/130589218/wimenikejij_nemezegifela_bededoj_rebule.pdf
    • http://cyberliabilitypro.com/uploads/1/3/0/5/130543366/d00d181db4d8.pdf
    • http://www.hutstricklin.com/uploads/1/3/0/7/130739444/nujiwibalexeku-defas.pdf
    • http://kissmybliss.com/uploads/1/3/0/3/130313561/zokasujozus.pdf
    • http://elclubdelaherramienta-grupovemare.com/uploads/1/3/0/6/130605112/9194171.pdf
    • http://www.seuratechnologies.net/uploads/1/3/0/7/130776159/764318.pdf
    • http://www.bloodhoundhunting.com/uploads/1/3/0/4/130490117/c3dd58.pdf
    • http://www.gogo365travel.com/uploads/1/3/0/4/130483759/suxemurawugakozad.pdf
    • http://mail.huddingedjurklinik.se/uploads/1/3/1/1/131164387/2bb4cbb4e.pdf
    • http://naturalchildbirthhelena.com/uploads/1/3/0/8/130813705/jelese-vananuzaxif-selubotivufo-devon.pdf
    • http://flexcareinfusioncenter.com/uploads/1/3/0/5/130588605/15728.pdf
    • http://positivelysisters.com/uploads/1/3/0/4/130493037/5229694.pdf
    • http://www.laywraps.com/uploads/1/3/0/6/130621030/9102757.pdf
    • http://mta-sts.mx.drcano.net/uploads/1/3/0/5/130551739/3725073.pdf
    • http://positivelysisters.co
    • 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_off00006e8e.bin
ddb47338e1997fff805bc7dcd984e29e5bdefbb845591ef024986e1a702a3a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8E 7576 bytes

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