Malicious PDF — malware analysis report

Static analysis result for SHA-256 36aab227b6691e63…

MALICIOUS

PDF

84.2 KB Created: 2021-03-19 11:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7be25118e57eff68aaa6bda31eeedf18 SHA-1: 5b02484076b2606bb494cdf9adef925d51514d76 SHA-256: 36aab227b6691e6344d839f95b12711a4f4dc3f4fb20f2721065f5af87c04c38
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 0.9998

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://druttle.ru/strik?utm_term=bissell+turboclean+powerbrush+pet+carpet+cleaner+%25282806%2529 PDF link annotation
    • https://cdn.sqhk.co/zisujidixa/bvhaNif/29844869061.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/arduino_uno_robot_projects_with_code3dipm.pdfIn PDF document text
    • http://d-youtube.com/what_is_a_self_destructive_personalityvl3xj.pdfIn PDF document text
    • http://com-connexion.xyz/how_to_charge_a_citizen_eco_watchpvww5.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/icjgMzI/sonic_wallpaper_hd_iphone.pdfIn PDF document text
    • http://aycotoro5.xyz/handy_diy_tips5kgz2.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://s3.amazonaws.com/wetevali/polk_magnifi_max_review_cnet.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_d6eeaac9dbf247cab6903409f1c2176e.pdf?index=trueIn PDF document text
    • http://wuwuxatedi.epizy.com/icandy_peach_3_carrycot_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/xamosupesarinade.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_f6f8d2dd71344680bf07df5b4ed2fc09.pdf?index=trueIn PDF document text
    • http://sojoramuf.epizy.com/13847323569.pdfIn PDF document text
    • http://xudowavujajewof.epizy.com/72576622741.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_0368da5caeee497a9b7604659a768a3a.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_df84c25d13584978b0cdbeb5a86cb7d9.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_832f04de93f442408958c2adbcb7667c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/seriposuj/does_whirlpool_make_a_counter_depth_fridge.pdfIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_5853e5cb9ba54928a2cc34411a02a283.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_2e27caf4e0514812844728c5515c2f89.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 5960 bytes
SHA-256: 0d0cc7b973b8e86ae4d9bbfbddd5556d3d2270c7340d0d574ba538ca1cfd2f10
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 11548 bytes
SHA-256: 415e67c1b8d40b4c847c53ba33ad19dee25c11b5488ecd637d7d1c2e34ecc44d
font_02_sfnt_off000134ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e