Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02f36c565a87a84…

MALICIOUS

PDF

102.7 KB Created: 2021-03-23 21:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4cc558d7b20769b8b9a42b00fca7cc94 SHA-1: c1e96d4707a0d1d981a24e3afa629dacd6c9ccc8 SHA-256: b02f36c565a87a844cb5e2a600601f68039591693a00e45de63238e53cfbe544
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or redirector attempt. It contains a large number of embedded links, many pointing to disposable hosting, designed to lead users to malicious sites. The primary malicious URL identified is https://dafemum.ru/award?keyword=cardamom+cultivation+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=cardamom+cultivation+pdf In PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/6170679.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/miduxikusenerapu.pdfIn PDF document text
    • http://gufutaca3.xyz/rowifomokubatelowajijocd7vw.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/a8a136509eb817.pdfIn PDF document text
    • http://fortuneo.biz/wheat_belly_cookbook_recipesdnv22.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/lazaxoxefilejulibazol.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://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_4096a47604754c4db4fac87c7f3868c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8798e4cb-1fb3-4076-9bbe-419620400e9a/tribe_of_mentors_tim_ferriss_free_download.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_19346ebf175c45d3a1bb16acd2219396.pdf?index=trueIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_c03e23d4bb7c40a09185b02b7f096637.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33804b8f-29d4-4086-b79b-13aa752821df/why_love_is_a_fallacy.pdfIn PDF document text
    • https://bc5d5878-7fc8-4b9f-a3e6-8b1a1bd4f47a.filesusr.com/ugd/3835dd_ef4ae4f5a3b84b39880c0e86ac8b67c9.pdf?index=trueIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_626f84eae7c7460c90424860a0cff12a.pdf?index=trueIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_c57854bcef7843508a88d1b6ea6393a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9eb18c-f6f4-40c8-a354-b2b2ca06a8c7/32670360774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbef111-3e00-4a24-9ae7-c914f62f1615/87658620220.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_f5857ce30d0647f092465a9d87339fd9.pdf?index=trueIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_acfdfbbe8d6c4b05b4706b5731ec50e2.pdf?index=trueIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_24268febc9eb45fa81a314f17f8842cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af8745c-b66c-47ba-9bf5-c2a0c2afe4a5/58193729720.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/how_to_change_drum_belt_on_kenmore_dryer.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_02bb4c6e28e544aa93c35170da887fc6.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8F 4968 bytes
SHA-256: 1a67a1c172d7a4fa79847700c5f655e86749172559074a2c88ee12918f0c7040
font_01_sfnt_off00013c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C64 14312 bytes
SHA-256: 9d84d1499f1973298cf2d33f878e71d25954cfcc27777372aae18fd000e36566
font_02_sfnt_off00016a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A42 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off00017eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EDA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361