Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd922ffcccc61c1…

MALICIOUS

PDF

96.8 KB Created: 2021-02-23 11:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d5888679785452807fc347a89e72f4a5 SHA-1: 5cf00ae129cb794f97211d25d190f8efba8f85fd SHA-256: 0dd922ffcccc61c193716ced57f593d75cabb7056cb1fe95b986816664c428fe
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating it likely hosts malicious content or redirects to it. The document functions as a link farm, containing numerous URLs pointing to external PDFs hosted on disposable domains, suggesting an SEO manipulation or content distribution scheme. The primary malicious URL identified is https://crophysi.ru/strik?utm_term=bram+stoker%2527s+dracula+full+movie+in+hindi+download+300mb.

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=bram+stoker%2527s+dracula+full+movie+in+hindi+download+300mb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fd2dccb2f2d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_5fc6c862339f1.pdfIn PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/5979077.pdfIn PDF document text
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/dc3c997d4ab3c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475719/normal_5fef85322e357.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/258815.pdfIn PDF document text
    • https://jojapunopumaj.weebly.com/uploads/1/3/1/4/131482926/09bac6ddce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601880536d32c.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/jipuziwugojub.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/5416119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_6031f9b91e774.pdfIn PDF document text
    • http://dofolamemudowu.22web.org/jikutepixivikirek.pdfIn PDF document text
    • http://xisajole.iblogger.org/riferodefa.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/6960813.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/fekitufa.pdfIn PDF document text
    • https://tesudegijalel.weebly.com/uploads/1/3/1/4/131438759/fireket-wuvowaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fd73aeae6481.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/bigilak_xudovazove_liluxiza_denudomotex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://pamakejexo.epizy.com/zara_uk_mens_size_guide.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000fa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 6008 bytes
SHA-256: e3b12d1564a5cd605a84cde0080ead60efd580ecb64ee59e5ed1257467464d4b
font_02_sfnt_off00010efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFA 20968 bytes
SHA-256: aa890c11d31957efca0fd402aa72a454fd9b4193136962196ca6c8da92cd1596
font_03_sfnt_off00012f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F29 2276 bytes
SHA-256: 04d00fe4d3d1cfb13f6c45ea00a1a16b92fe51d00c0709aca980b96f225372d0
font_04_sfnt_off000138ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EE 2220 bytes
SHA-256: ae86d245ae62678e92405764538cfb59d8913b77053d7d4548daae52daa2eaef
font_05_sfnt_off000142f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F8 12276 bytes
SHA-256: aa7906137e0df996222ba7cb9daac4cf69633bf44204b8bc6736c5c61ceb4b58
font_06_sfnt_off00016a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A6D 2056 bytes
SHA-256: 2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266

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