Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd1b8b33b13f09c…

MALICIOUS

PDF

82.5 KB Created: 2021-04-21 01:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e2255e98c188d1fc62ee0e999cf8cf28 SHA-1: 9be16756aa420fed670917bb96babf42a7185b40 SHA-256: 0dd1b8b33b13f09c6fba3590e33cf5d60ee92a4b390a20e4adb4f8ef645a9a54
186 Risk Score

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 0.9992

Heuristics 6

  • 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 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://xezojetit.ru/strik?utm_term=doe+method+of+concrete+mix+design+example+pdf PDF link annotation
    • https://cdn.sqhk.co/wewowedim/9icihdb/high_speed_chase_los_angeles_live_now.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/0e0949dc9e46e5.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/WlidCii/12003426903.pdfIn PDF document text
    • https://cdn.sqhk.co/vujositet/hep96XS/27864789006.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/IijfQzv/89517762386.pdfIn PDF document text
    • https://wulenewovifof.weebly.com/uploads/1/3/4/5/134588468/2dcb568e040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_0451c12c74f148c7a2ae471923748245.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_60c037c05c4c48dc9cd8207e5655cfff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/is_the_monash_fodmap_app_free.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/fabowedevafire.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_dbae34dbe8814067ae46c901fb5152b0.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_1a736f90f2064ca499cb9eda68eb76b3.pdf?index=trueIn PDF document text
    • http://wupidusujimi.myartsonline.com/antologia_de_cuentos_cortos_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/materials_3d_photoshop.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_0717233c89bc42d6a182290158968960.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_2abe3b4856c0423fb3981af882c9945a.pdf?index=trueIn PDF document text
    • http://jusopetikikij.onlinewebshop.net/75580066287.pdfIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_2bb30f12dcd5437fbc13753e69942f43.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_e092ef5f95d849079aa93b6fc5b1a651.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/instagram_update_apk_ios.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_4f09e7d29afa40ed9b4ea6c7d06dec9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/78581303341.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_26adfc1f7fa84712ba82dab8f2d97002.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 5636 bytes
SHA-256: 97eb9f0d8cf135b59b1317ac3db300dcc640fc07ab0c5543e1def1604784b5b8
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 11124 bytes
SHA-256: d0ad25283055e5bfb434011e30ad4813a30752bca3709fece69ebe874444773a
font_02_sfnt_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 16088 bytes
SHA-256: 3c1c7bd747a9a8f6e1c531457064e9378d9a893e5271ac7381d9d0015290d8f4