Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35242c1ff2dccef…

MALICIOUS

PDF

82.7 KB Created: 2021-05-12 15:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 672e31591d5a9869814a576b2be7624d SHA-1: 49ed1aece28d8312d57a84530259ebe6ded38238 SHA-256: f35242c1ff2dccefb77d61fe0f0badf52e3418bad319a8c933abbb83f46d80a9
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 0.9995

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://lozipotod.ru/strik?utm_term=the+new+bottoming+book+free PDF link annotation
    • https://cdn.sqhk.co/gabamulijawe/eyjdsMR/feed_the_gods_white_zombie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fd7dcd0cbd60.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/8sYhehh/letra_da_musica_favo_de_mel_rio.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/diagrama_de_equilibrio_hierro_carbono.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/3DjblXO/nokeraliwuseteso.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/vavizanegozogevime.pdfIn PDF document text
    • http://wofijitabudo.22web.org/64100259860.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/2hijaqy/word_of_the_day_app_uk.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/nopibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_603b0ecf43557.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/is_accounting_a_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6031f60133e04.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/vepipuwolaxewivinuput.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mefowoweman.epizy.com/what_does_a_aficionado_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78acfaef-fe86-41cf-a335-1562bb8ddf92/ravitujugigakowasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b617f4-4265-4fe9-9092-9eb7521c1d39/84013321352.pdfIn PDF document text
    • http://sedegagagojuwej.epizy.com/pinuvik.pdfIn PDF document text
    • http://keximatefabuzi.rf.gd/gajoritomada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb38bd3b-370d-455f-9527-f543926655f1/98808132853.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/intellij_generate_getters_and_setters_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23faaffb-8216-47d8-b003-df882a9cb387/siluxologoma.pdfIn PDF document text
    • http://feferabi.atwebpages.com/70636442537.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_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 4796 bytes
SHA-256: 80bdc2c41e658dc779552ab36fe616a8b64bbfda2a9c3cbb5d5e98d8a0559ba6
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 10900 bytes
SHA-256: d994ad0e835196952d8e7e3f69db424a8eabc359350bc06b0af8ae9d1aa97153
font_02_sfnt_off00012f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230