Malicious PDF — malware analysis report

Static analysis result for SHA-256 6324af6aab53cf32…

MALICIOUS

PDF

82.9 KB Created: 2021-05-14 04:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 11da4ac93382d073cffb83963e90150f SHA-1: 2f65bb90ab68d159cdf938f37382dd88f66609a8 SHA-256: 6324af6aab53cf321756ec3f48bc2efddb1e27c3e70d4dfd6c0209bfcc932b2f
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to disposable hosting or known redirector infrastructure. The primary malicious URL identified is 'https://crophysi.ru/strik?utm_term=how+to+reset+maintenance+on+honda+accord', which is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to car maintenance, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/strik?utm_term=how+to+reset+maintenance+on+honda+accord In PDF document text
    • http://shopwithsale.website/how_much_is_apple_tv_3rd_generation_worthi7nlo.pdfIn PDF document text
    • http://idealslimitalia-official.site/66533271299p8xsy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_6064cdcc3b314.pdfIn PDF document text
    • http://20970907.net/38874394315bumc2.pdfIn PDF document text
    • http://cmb-eco.com/39474132920oa6mp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2699a15a5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384145/normal_5fe3e929461a1.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://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_371007f341f4422382dfc03c829d21db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a426bb2-f6e6-405a-a8df-e62fbd0a2d83/45836330338.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/citizenship_application_study_guide.pdfIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_a358a7afd198445c9eff33574d472b55.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_9a02c605447d40e19ba628245ccb3946.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutasujal/what_does_the_opponent-process_theory_suggests.pdfIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_1506bc43b4e3410b8297855934710f0a.pdf?index=trueIn PDF document text
    • https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_1b026702a94c48bb95759d3b259c5473.pdf?index=trueIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_daa7d480aef940b08c7b590020d8faeb.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_229703e688f74fc694e00f499b41e99f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/49229011910.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_26deb07c990041b0a9c63a5749650151.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af20c456-a44a-4aaa-801e-1d3d4f6b1ad0/mossberg_930_spx_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d982f570-79ba-4fae-a6b2-aed7aff358f6/55181904593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b02309-6cc8-48d6-8e12-05f08e6b6f60/how_to_do_a_news_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066c36e2-b6c8-432c-b5c7-1bf0984eb5b9/gefupe.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_8828fc7d66834d2fa0891a67d2c08af7.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_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 4988 bytes
SHA-256: 91425723b5779c0acada2d1fd7fdc7ca2ea2367dd7de0746352e72a2af751c5a
font_01_sfnt_off00010adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADF 10828 bytes
SHA-256: 4e02637486eda979dd81771fcaaf37bc7b7d1080da0a077a48acf4db8d94a0da
font_02_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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