Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d780f64ef37d61c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-13 13:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04f4e5f04c45f131dfc23cdb52d3dcf2 SHA-1: 3bfee238e9e209c43c34feae0948db1fc739ac14 SHA-256: 2d780f64ef37d61c454bbfd84c65d339f830766a9ebcc489a69c07d187e23d7f
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting an attempt to lead the user to a compromised site. The heuristic firings indicate this PDF is designed to host a large number of external links, likely for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=civil%20engineering%20reference%20manual%20for%20the%20pe%20exam%2013th%20edition%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_601764ce32947.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/ruluvukutupanir.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/c7cab60edadba33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_604c99bcb6ad9.pdfIn PDF document text
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/kanesezuxofit.pdfIn PDF document text
    • http://nazhivy.net/36519017058de658.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/xikagaxazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_600c148984587.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/5892178.pdfIn PDF document text
    • https://bazigumaxofiz.weebly.com/uploads/1/3/5/3/135383162/d4f4a25.pdfIn PDF document text
    • http://zhk-samolet-krasnodar.info/679490399721wpip.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/tuxexi/zefax.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_86c21ed6c9dd406fb49e4b355792f709.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dagasopones/pubg_wallpaper_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/naruto_shippuden_ultimate_impact_psp_iso.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_8c53a58f9d5f43bdab12d2ef553b60de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezewu/55171951521.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/will_red_cross_test_for_covid.pdfIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_39cdcb2b77fe4c5dae124f5cca07d953.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 5640 bytes
SHA-256: 263c17f9d9e70719c3456438daa9fee18aeae859436d2e0e7fbb82d616f32204
font_01_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 11052 bytes
SHA-256: 2a1917058bae4b650ba89c281452c1036eb9a497210f454bbccecca14b4362b2

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