Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ada1448a8ecd67d…

MALICIOUS

PDF

84.1 KB Created: 2021-03-29 11:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 866cd2e203e63e2f9ef0bca270d8482e SHA-1: 2fe9c5e5cc5e17f323cba438e9536c54f89e27bd SHA-256: 7ada1448a8ecd67d980a513d75d346160b72d089791d036f2acb42abe83a4c65
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of embedded URLs, many pointing to PDF link farms, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicates maliciousness, and ClamAV detection confirms this, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=functional+ambulation+classification+fran%25C3%25A7ais In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_602dcca860f7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fde3d36af183.pdfIn PDF document text
    • http://yourlivehelp.com/snapping_turtle_habitat_facts02guo.pdfIn PDF document text
    • http://jumbochecker.com/5664394238d911e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_5fd2350e38dcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5fe535530d0b4.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/luvejogejazajukogoj3i.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/10684717430506h8.pdfIn PDF document text
    • http://parrrtner.xyz/vomigapubit4fpf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_6039f533ef833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/gizizetiwotafirirexixefug.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/mujse_najre_churane_lage_ho_song.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_f3fbe9c2a5f74eee9e7af8329200fbbe.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_623744653d61445a8cd69463b9bbdf3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/risedapiletelax.pdfIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_1a5ce97055a6404ca44955d393f29b4e.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_2fabbb1312124a10a5a48e0885884f72.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_3467107c8d394360bc38c9efc48a1dcd.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_876b629afdd24fb59c225a1262f3b647.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidivo/singer_simple_3223_bobbin_case.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/didofelokuzola.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D3 5304 bytes
SHA-256: c4a9c4d836c93300cf206d4b2bf946c97d2368755db72c0b7d2fac51ee4ba3f7
font_01_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 12104 bytes
SHA-256: 033c4790f39bc56858a91e013bf8ad377eeb89ad0ac7ce189e633edb78433bd7

Open this report in the interactive analyzer, or submit your own file for analysis.