Malicious PDF — malware analysis report

Static analysis result for SHA-256 8165af7502980d0b…

MALICIOUS

PDF

35.9 KB Created: 2020-03-15 07:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a3d85dedf88c5bd5a33d5b9d2cdfa671 SHA-1: af6d0dd7975a103926b79285d2472309aaca73b1 SHA-256: 8165af7502980d0bf1f7ac83ba25e23d5c54c003d0c2a841abfb8d6d5ea7389c
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating a potential SEO spam or link farm operation. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text and references to 'Tamil christian songs ringtones mobile free', suggesting a lure to attract unsuspecting users to these external sites.

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://katiaponomareva.com/uploads/1/3/0/7/130739614/130739614.html#tamil+christian+songs+ringtones+mobile+free PDF link annotation
    • http://cocosartisanscollective.org/uploads/1/3/0/7/130775786/merubo-xiwonexatowe-rosezawi-xolamedewuko.pdfIn PDF document text
    • http://mta-sts.mx0.crossfithh.de/uploads/1/3/0/5/130588445/modugat_jesuxewepis.pdfIn PDF document text
    • http://stanfordinnanaheim.devsite-1.com/uploads/1/3/0/3/130379347/58d962d68.pdfIn PDF document text
    • http://vascularclinic.com/uploads/1/3/0/6/130605510/jusokaw-xotajilodorona.pdfIn PDF document text
    • http://dojofernandoalonso.nl/uploads/1/3/0/6/130621880/6350828.pdfIn PDF document text
    • http://designsacredgarden.com/uploads/1/3/0/4/130475879/suros-xukozojufo.pdfIn PDF document text
    • http://rivercityenv.com/uploads/1/3/1/1/131163752/51cffb17.pdfIn PDF document text
    • http://mquest.space/uploads/1/3/0/3/130323674/valuzapeteguzu.pdfIn PDF document text
    • http://customerfocusedlearning.com/uploads/1/3/0/6/130604201/karevobufukokaxazeko.pdfIn PDF document text
    • http://singletonstriders.com/uploads/1/3/0/8/130813458/zazifojafilekaj.pdfIn PDF document text
    • http://www.talkinshops.com/uploads/1/3/0/4/130488736/8460674.pdfIn PDF document text
    • http://akihiroyasui.com/uploads/1/3/0/5/130589007/7705854.pdfIn PDF document text
    • http://hearingaidsbycarol.com/uploads/1/3/0/9/130969004/b3359a1bce15.pdfIn PDF document text
    • http://host101.carmichaelnl.com/uploads/1/3/1/0/131070718/45ef61787f18.pdfIn PDF document text
    • http://airporthoppermaynooth.com/uploads/1/3/0/6/130620957/giwuzezekaseka.pdfIn PDF document text
    • http://leepehgee.com/uploads/1/3/0/5/130590355/5835764.pdfIn PDF document text
    • http://www.thebodycureoffers.net/uploads/1/3/0/4/130436197/8846821.pdfIn PDF document text
    • http://randomminds.net/uploads/1/3/0/7/130738680/7348911.pdfIn PDF document text
    • http://andykoting.com/uploads/1/3/0/2/130270971/zusewagukobafeg.pdfIn PDF document text
    • http://nickkessler.net/uploads/1/3/0/6/130604498/4e58d1fc1b83.pdfIn PDF document text
    • http://www.alienbooksprague.com/uploads/1/3/0/4/130478709/9cc86dc5564b6b1.pdfIn PDF document text
    • http://webnock.info/uploads/1/3/0/2/130291786/fdefd7e4d07bda7.pdfIn PDF document text
    • http://wakmfgi.sites.logojoy.com/uploads/1/3/0/5/130544447/fobelemiz.pdfIn PDF document text
    • http://imminentchaos.com/uploads/1/3/0/6/130621965/2086709.pdfIn PDF document text
    • http://drbabino.org/uploads/1/3/0/5/130543035/fuvajawozuwug_biwawejezo_fajegolitotepe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 6968 bytes
SHA-256: 3f8616258266c0e68b3ea5647fab9aa4cc0e565d92d30d989e0ab9f91b0be278

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