Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebc12fca9a33cc8…

MALICIOUS

PDF

74.2 KB Created: 2021-03-08 05:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 11ca4e02e7cb97ca7293bc51f0b1022d SHA-1: d17645a882b272f811c348d52d0a9dc74b5042d9 SHA-256: 0ebc12fca9a33cc8cd1b9ee3c573dcd4b55dc4dd7820e10d2c509eb37a0de4ec
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links are designed to lead users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=how+to+start+in+safe+mode+from+command+prompt+windows+10 In PDF document text
    • https://cdn.sqhk.co/mewivupa/2rCzhhi/60844365785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471484/normal_600c21333446b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5fdbdf0e34b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_604476eb2c9df.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/eibVSgd/extinction_coefficient_calculator_peptide.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuzadisup/ihgfgi1/put_exonerated_in_a_sentence.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/49039cd6fc535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495988/normal_6004747988155.pdfIn PDF document text
    • http://shtancircul.site/electronics_engineering_books_free_downloadmo4m5.pdfIn PDF document text
    • https://cdn.sqhk.co/saturarad/qLkjahc/legendary_raid_boss_after_giratina.pdfIn PDF document text
    • https://pisusafinado.weebly.com/uploads/1/3/4/3/134363103/1270520.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5fe2d8bb40477.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/haif0cN/costco_potstickers_ingredients.pdfIn PDF document text
    • http://smeh-mif.space/19339573707nfaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/e34Ogd4/mcps_portal_parentvue.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/5067362.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/5aihFhf/november_2020_calendar_with_holidays_canada.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/xukanomarexumu/xapulenurub.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/xejikixevutoresijogewupir.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/ashokan_farewell_guitar_arrangement.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_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 5516 bytes
SHA-256: 7609f4f7aa3e4b8d41274326a7c8fdf3bfd29ffc05d0ac7cac7d7e5803bd2dc9
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 10344 bytes
SHA-256: 32156ede3fbefb841a3548f5c6112e06a76b44f69759510ac55dda1d19e25a3d