Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a5a6496849ac61…

MALICIOUS

PDF

49.5 KB Created: 2020-03-29 12:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0189ba38787d1560f960e4bde177937 SHA-1: deb7f9b5eaa4f6e4b72353a9aa017a24657c560c SHA-256: 34a5a6496849ac616e50c36ef3520eba83e5043d1889e0d60daddd76b5dff056
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious content or improve search engine rankings for those sites. The ML classifier strongly supports the malicious nature of this PDF.

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://adsl-63-204-18-21.benefitplans.org/uploads/1/3/1/0/131070190/131070190.html#maximos+y+minimos+criterio+de+la+primera+derivada
    • http://alissapetsche.com/uploads/1/3/0/5/130589412/putipijiwa-voxelugo-pugezed-woluva.pdf
    • http://billsfrenchbulldogfriends.com/uploads/1/3/0/7/130775129/713bfd5082.pdf
    • http://wisdomforinspiredliving.org/uploads/1/3/0/6/130621708/c78282.pdf
    • http://cconsultingsa.com/uploads/1/3/0/6/130620649/bodetoduwoturajemuw.pdf
    • http://1eartchchangesmusical.com/uploads/1/3/0/9/130968949/4927396.pdf
    • http://destinedtotravel.org/uploads/1/3/1/3/131383242/pigomepab.pdf
    • http://89webdesign.com/uploads/1/3/1/0/131070306/juruxa.pdf
    • http://wvh2h.com/uploads/1/3/0/7/130738650/ruvorifaxixugetemi.pdf
    • http://ecojusticeandfaith.org/uploads/1/3/0/3/130323526/virofepinakap_futero.pdf
    • http://thepaisleyroseflowers.com/uploads/1/3/0/7/130775400/623051a65.pdf
    • http://angelandthebadmen.com/uploads/1/3/0/6/130620389/mudekalifebazig.pdf
    • http://ambusinesssolutions.net/uploads/1/3/0/6/130604411/buwojorevipelabok.pdf
    • http://worstdayoftheyearrun.com/uploads/1/3/0/4/130435509/db342a79.pdf
    • http://criinternational.org/uploads/1/3/0/8/130874305/a8db59cd063d90.pdf
    • http://tdrcsllc.com/uploads/1/3/0/8/130813314/wiwizi-wijid-tijos.pdf
    • http://nurcamps.org/uploads/1/3/0/3/130313783/37dc16.pdf
    • http://teengirlreads.com/uploads/1/3/1/0/131069891/2681c.pdf
    • http://dropshiponlinenow.com/uploads/1/3/0/2/130288893/dawosalotorumekire.pdf
    • http://foyntonsberg.no/uploads/1/3/0/7/130740019/9276591.pdf
    • http://linabaz.com/uploads/1/3/0/6/130604548/vobomuboniro-ruruwijiguv-dogaguloguge-wimadiduvogaxil.pdf
    • http://soultender.info/uploads/1/3/1/3/131383536/2336313.pdf
    • http://mpbuxton.com/uploads/1/3/0/4/130435821/5867065.pdf
    • http://knightsorderlemc.com/uploads/1/3/0/8/130873822/fumuxesot-xororetopujiz-nofujiw.pdf
    • http://sofuco.net/uploads/1/3/0/2/130271046/322061.pdf
    • http://knightsorderlemc.com/uploads/1/3/0/8/130873822/fumuxesot-xororetopuj
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762f.bin
f59f8460ca1c83b3e4cca586b655a0a2951d8d210562cbf9b9e3bef3dc9d91c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 8964 bytes
font_01_sfnt_off00009701.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9701 2652 bytes
font_02_sfnt_off0000a068.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA068 16036 bytes

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