Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e579615ab05362a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 12:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c27b65193e88292a07552c0c37197234 SHA-1: 7fa3178459ea74a756df17bcdabdb6740791e0fa SHA-256: 1e579615ab05362a7167b1dd6eb05794a95f137230a8629554f9275e4adb5552
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm, with one prominent link pointing to 'botokaw.ru'. This suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=apush+time+periods+2019
    • https://cdn-cms.f-static.net/uploads/4491670/normal_602aef813420c.pdf
    • https://cdn-cms.f-static.net/uploads/4381297/normal_604cfaad99dc4.pdf
    • http://konufij.22web.org/what_do_the_poppies_represent_in_the_poem_in_flanders_fields.pdf
    • https://static.s123-cdn-static.com/uploads/4365551/normal_5ff24a602d53a.pdf
    • https://cdn-cms.f-static.net/uploads/4448337/normal_601e173987337.pdf
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc5d13519a34.pdf
    • https://static.s123-cdn-static.com/uploads/4375704/normal_5fe267ef65e4c.pdf
    • https://cdn-cms.f-static.net/uploads/4376382/normal_604d7407f0071.pdf
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5febdf32e08a6.pdf
    • https://cdn-cms.f-static.net/uploads/4412606/normal_6013a6027f238.pdf
    • https://cdn-cms.f-static.net/uploads/4474999/normal_603fc3dc40022.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_d88fef26cfc5458baf91fd2d949fe8b0.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_260c2ee3ffe04ca2b956b89b4b82ea8d.pdf?index=true
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_5ac7921353044e42b9c80c6ad88295ba.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_5232e66e76fd46a7804401b51d6cbddb.pdf?index=true
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_7bcafbc828dd475ab4d2c80f31b0731a.pdf?index=true
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_097a6866bc884299b73911cf49c0f273.pdf?index=true
    • https://s3.amazonaws.com/wutisigila/silence_is_the_language_of_god_in_persian.pdf
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_02b5bb8452b4456b8271ae7b435fbc8c.pdf?index=true
    • http://wupepiwora.rf.gd/netusofasijasisa.pdf
    • https://s3.amazonaws.com/gotijejaj/cara_video_twitter_via_iphone.pdf
    • http://buxidojulatur.rf.gd/the_arduino_inventor_s_guide_download.pdf
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bd.bin
aa852b922f56efc2247071d85ddcd130cb23f5d981047f19461aa0018674cdb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 5428 bytes
font_01_sfnt_off00010a0e.bin
4c6aa7b9fd3ad0da135159939320d01c15dea244f6c6ec85f88c57ae7706494d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 11348 bytes

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