Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2b33b882e83085…

MALICIOUS

PDF

62.0 KB Created: 2021-02-21 17:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5ad095537ea2faabf37099968132c7c9 SHA-1: 414d742a57bb2b5663ee6c4a1cb08b9cc155ff60 SHA-256: bf2b33b882e830852d29c8a46c2789c738aa7191df9f25711a021a8164c05b7e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or content hosting strategy. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of these indicators strongly suggests a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://yafferge.ru/wix?keyword=camp+geronimo+map In PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_601ce5257ff82.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/kigidorare_vunoxaw.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/bomovuxinop-zodus-zawenu.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/gcRbhcE/tasofavamelekezusadegate.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/ghjjdhh/black_friday_sales_online_right_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff490f9bf215.pdfIn PDF document text
    • https://nekuferalota.weebly.com/uploads/1/3/1/4/131406939/doduxogo_lepuv_kiwuzokozozada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5fe52ee139308.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/0geshi7/software_development_business_plan_doc.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/6867542.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/nuselufuzo/sticker_maker_for_whatsapp_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/97868298555.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/wedotonitirunakama.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/laveradetizofixitibuvezut.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_off0000b653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB653 4836 bytes
SHA-256: f4238e4982a5fc0854807ff4491d082b0ce1673df0fd9ef3d6e2cbb7d1d85438
font_01_sfnt_off0000c6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AB 11260 bytes
SHA-256: 0fcda44e2ada453204b028f4d2d70bca93653b3437a9c2720019906809d302b6

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