Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cc289139631843…

MALICIOUS

PDF

80.4 KB Created: 2021-03-17 18:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 249759099454874d1ff606a54dd4bb95 SHA-1: c9a6a3a78067432fadbd0cf496bbb5d21f73b5d4 SHA-256: b3cc289139631843b2111faf5d231f1fc1b28fa1ff95d96975354874bd1af302
124 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one prominent URL leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9423

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://xajibur.ru/award?keyword=adarsha+hindu+hotel+by+bibhutibhushan+bandopadhyay+pdf
    • https://cdn-cms.f-static.net/uploads/4410443/normal_6039275a96bc8.pdf
    • http://ruwufuwetoj.mygamesonline.org/graco_nautilus_65_3-in-1_harness_booster_car_seat_manual.pdf
    • http://wusumomijo.medianewsonline.com/cancionero_de_zambas_para_guitarra.pdf
    • https://cdn.sqhk.co/zevinikiwi/hfIjfMm/knight_of_cups_love_feelings.pdf
    • https://static.s123-cdn-static.com/uploads/4383680/normal_5fff6c3fa46b0.pdf
    • https://cdn-cms.f-static.net/uploads/4424666/normal_5fd1fce45ace5.pdf
    • https://cdn-cms.f-static.net/uploads/4459027/normal_602972aac297a.pdf
    • https://cdn.sqhk.co/muwizavo/gjdI4hg/joxepowaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4470545/normal_5fdc86ec8d2f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gapoxuvopa.onlinewebshop.net/jitimafuvadiduduvafas.pdf
    • https://uploads.strikinglycdn.com/files/45c967dc-1c70-4d01-a493-75e053c2b0eb/niwurixemoxigo.pdf
    • https://uploads.strikinglycdn.com/files/e706532d-cb24-4f8a-a746-9e2e4f9c2d51/spoken_english_online_courses_in_india.pdf
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_187510d3c4ed4e608915c511444a4466.pdf?index=true
    • https://s3.amazonaws.com/toguvaju/zukubu.pdf
    • http://fazaburifug.myartsonline.com/zagotapudibegusi.pdf
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_2f959ad6bc494ad980894f688f374b16.pdf?index=true
    • http://gaxilitexu.onlinewebshop.net/kiwisukosaxugodujopup.pdf
    • https://uploads.strikinglycdn.com/files/4a0d4904-c26c-4397-954f-d8f13923f03d/marvel_avengers_infinity_war_thanos_gauntlet.pdf
    • https://s3.amazonaws.com/rovikibixu/98760263715.pdf
    • https://s3.amazonaws.com/tezofuretejom/my_talking_tom_cat_game_free.pdf
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed63.bin
b3454d83d7ecdd7baedf4ed1d59fd2367de0562c7e102353fd60062749f0a5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5240 bytes
font_01_sfnt_off0000ff27.bin
be184c40f2063c72dd3039444d5284f599ea5798dff6029880b6ea42686bdd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 6476 bytes
font_02_sfnt_off000113dc.bin
429460b7ba2c84ff2fc5f6f6a90d690ad5057efe525b9f8a3142d9cb1b94b0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 11672 bytes

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