Malicious PDF — malware analysis report

Static analysis result for SHA-256 6570c4f935ed6232…

MALICIOUS

PDF

37.8 KB Created: 2020-05-13 18:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f48e09be4a54315837377761521b0883 SHA-1: 4df27bf70d3335d60e1b38a45722b6a85fcc4d44 SHA-256: 6570c4f935ed62321cc819f9253d4287da399a4efefa2455bebeab2d1f62cb48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a potential attempt to redirect users to malicious content or to manipulate search engine rankings.

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://jessicalgervaisbooks.com/uploads/1/3/1/4/131409508/131409508.html#firefox+52.+9+esr
    • http://georgieriggscelebrant.com/uploads/1/3/0/7/130775986/veseluxiwiz_jewib_bopexu_sojivusosabu.pdf
    • http://vfw5205.net/uploads/1/3/1/4/131452904/3042249.pdf
    • http://jmmarcom.com/uploads/1/3/0/7/130738845/4552311.pdf
    • http://sugaorchidscentsco.com/uploads/1/3/0/5/130539336/loxiza-zagineb-zaberidepo-kefekidilol.pdf
    • http://chelseasalonseries.com/uploads/1/3/0/5/130543543/pijat-vagijisesog.pdf
    • http://vebastore.com/uploads/1/3/0/6/130620501/pilamiz_govifepadopi_foxoxovuj.pdf
    • http://aberdeenlatinschool.com/uploads/1/3/0/9/130969293/f2c8bc8b3c99.pdf
    • http://sweettreatsbyjules.com/uploads/1/3/0/7/130740298/vizuzo.pdf
    • http://almagroupsrl.com/uploads/1/3/1/4/131453132/wumipuxabizebi.pdf
    • http://hairbytasha.org/uploads/1/3/0/3/130313366/kotafizizesek.pdf
    • http://texmexfrijoles.com/uploads/1/3/0/7/130738632/finexakinoduku-fesajivobok-dolokoru.pdf
    • http://ewappliance.com/uploads/1/3/1/8/131871799/mizobizalofuburoj.pdf
    • http://renewyoucancertologyuk.com/uploads/1/3/1/8/131871726/jepalejeme_nuxepijogaf_danirusalagub_pufufom.pdf
    • http://sswithgrace.com/uploads/1/3/0/7/130776791/94d7a37ababbcaa.pdf
    • http://smosupport.com/uploads/1/3/1/1/131164358/7661685.pdf
    • http://purplepeace.net/uploads/1/3/0/7/130776823/rufug.pdf
    • http://masonicoh21.net/uploads/1/3/0/6/130620561/fixejoze_laxubofi_golev.pdf
    • http://yolandadoriamedina.com/uploads/1/3/0/2/130273804/3de073f0.pdf
    • http://universitystemacademy.org/uploads/1/3/0/7/130739936/6292565.pdf
    • http://vambeauty.com/uploads/1/3/0/7/130739159/zotavufaler-bowukiwajet.pdf
    • http://quellintablets.com/uploads/1/3/0/7/130740616/2289863.pdf
    • http://storygems.co/uploads/1/3/0/5/130543483/vunupavur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e3.bin
a8c4cd6e9f83c8df19de7c7107c209ba69d160fda4c800c145a4d7984b638654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 12100 bytes

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