Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53a9fe984b714fc…

MALICIOUS

PDF

116.4 KB Created: 2021-03-04 15:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c476f1adede0c549b6028b9ac4fc057a SHA-1: 117b12465fbb5e8a54de5e6c4bf915dd70a41081 SHA-256: f53a9fe984b714fcfafeb2dd01429f152261e065984aa5a980866a5657623612
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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
  • 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 https://leonvi.ru/wix?keyword=kangaroo+joey+pump+service+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489969/normal_5feb109089080.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/98113628375.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/91392854822.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/what_batteries_does_the_ingenuity_convertme_swing_take.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/68424104372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601e0455eb45c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498330/normal_6009500fb713f.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/the_dragonet_prophecy_graphic_novel.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/32718845575.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/41420859604.pdfIn PDF document text
    • http://disozire.mygamesonline.org/35750141019.pdfIn PDF document text
    • http://watomidipokaki.22web.org/experimental_probability_worksheet_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467975/normal_60089de5a1b90.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujirageg/janapada_kannada_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/coliforms_present_in_well_water.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_a138d705cde14588b1ce49fc2a870b7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/top_10_bollywood_songs_2018_list.pdfIn PDF document text
    • http://xixagitaderakon.epizy.com/zyxel_mwr102_travel_router_manual.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_f112598c7bb745d39962e21c309557e1.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_3a66d612281f4c3d9589e928042f0e79.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/sefizaxifow.pdfIn PDF document text
    • http://rebokomixuxoj.epizy.com/19622504425.pdfIn PDF document text
    • http://xuxusemo.epizy.com/nererabaxibupiviwagereri.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/64757585984.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000166cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166CF 2260 bytes
SHA-256: d3cc057549b3d945793198fe80ebafbbc6f685ee4230636d82a4ab0fc12d2d15
font_01_sfnt_off0001708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708C 5460 bytes
SHA-256: e9f2e58c2a1b39a3d6b18eb52c2719b4808218f20155394b5a0ab65040b89a31
font_02_sfnt_off00018327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18327 21396 bytes
SHA-256: da0a7d8b9e70459315bef098d9e0acc0cd31afb6b451508c97830e8410d2ddea