Malicious PDF — malware analysis report

Static analysis result for SHA-256 0adc86e8cecb0728…

MALICIOUS

PDF

82.3 KB Created: 2021-04-22 23:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba3097cbba9d3f4f14a5c3c7cd5336ea SHA-1: 970f85e9e86849718ba80e46478bfefd79bc2e36 SHA-256: 0adc86e8cecb0728a359556e20efc963c5cddab52078a7a5ac7e7725ac5debcc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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.
  • 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://druttle.ru/strik?utm_term=food+pantry+sioux+city+ia PDF link annotation
    • https://cdn.sqhk.co/tusufawenu/bif6vOg/nepetukivu.pdfIn PDF document text
    • http://banquepopulaire-fr.org/fonuxeweriwidavoh3qg0.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/kij1ieR/52652847293.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/heCSgeP/3940048883.pdfIn PDF document text
    • http://3203epworthcres.com/41927988869iw4hd.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/VgjjjDp/6217781289.pdfIn PDF document text
    • http://juwapes.22web.org/16065464696.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/1320c4.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/gghfiaW/kifusexawologu.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/qicigVp/88730987225.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/siaoUjc/jewel_starbucks_hours.pdfIn PDF document text
    • https://pewatusikowago.weebly.com/uploads/1/3/2/6/132683224/vewuvovetadug-sepete-wenokuzare.pdfIn PDF document text
    • http://idslim-italia.site/investing_in_real_estate_gary_eldredw4myk.pdfIn PDF document text
    • http://my-credit.info/zulobebidexejpk45e.pdfIn PDF document text
    • http://aycotoro0.xyz/16613538105qls6o.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/eFgghfP/nelemitorufegum.pdfIn PDF document text
    • http://dukelaxi.iblogger.org/80986734371.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
    • https://uploads.strikinglycdn.com/files/29375e7f-ec98-4156-ade6-7b1930f3b026/sizeditajaxuzogipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829a75d3-2fd5-4831-8ed9-379f3952ce56/wefuzifolatujosita.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_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 4924 bytes
SHA-256: 4e151c540a9d9781e0cae2b4c01ac8d189ad00c1ac312579bf304af54aa483c6
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 10876 bytes
SHA-256: a7835756ba7e02a0e544ac2313db9ae4d07ead2948cc782965fae372fdf742f1
font_02_sfnt_off00012dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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