Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e38f986b2f81b9…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 06:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6ca0d04daa6d2f75c6bef2e5c461b135 SHA-1: 1d70aeb510b0ecb1df194cb2fc97fd06d56914c9 SHA-256: 46e38f986b2f81b9a5a21e1a0707da5d6f303d0177040065652c69631a3189db
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=minecraft+aqua+affinity+enchantment+level PDF link annotation
    • http://butalinonoruma.scienceontheweb.net/16499695988.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/loop_commerce_acquisition_price.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/side_effects_of_antiepileptic_drugs.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/kizexatikivotiji.pdfIn PDF document text
    • http://folivapizi.66ghz.com/carbonless_forms_printing_philippines.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/32379521412.pdfIn PDF document text
    • http://savineme.mywebcommunity.org/fexor.pdfIn PDF document text
    • http://zuzotolifewujex.22web.org/32756388266.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/zujudejiloze.pdfIn PDF document text
    • http://busijizi.medianewsonline.com/jogutamanowudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/nuzazikiburidujupo.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/69978920944.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/somewhere_over_the_rainbow_chords_in_c_major.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/wolevis.pdfIn PDF document text
    • http://rubujizuz.epizy.com/learning_spanish_verbs_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/hotstar_apk_direct_apkpure.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/vafunarediw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 5236 bytes
SHA-256: 9f6bf99a635736940d9cdbf7ffd15f535d9f7019c2e2d7b8f5aba1a31098c0cc
font_01_sfnt_off0000f895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF895 11068 bytes
SHA-256: 4c03cbccb91a4dbd109373ea2bdac0bd5d67d5b25c8c618cf0cf4dd1bdfd371b