Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d548ca4d0f02b5…

MALICIOUS

PDF

67.2 KB Created: 2022-05-29 17:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 7b2e2e330f9b9e33f1e96f3260f7cb20 SHA-1: a5f6b7d4764d81a09303e8dd7ed8cc676396cdbf SHA-256: e0d548ca4d0f02b5e577040dde42df6d8554b9ea11ee0eaddcf5f226fcdceac0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains numerous external links, with a significant number pointing to potentially malicious or SEO-spam-related domains, such as `sunuf.co.za` and `herve-coiffure.ci`. The PDF structure and the presence of many external links suggest a phishing or malware distribution attempt, masquerading as a document download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://sunuf.co.za/YmrXLWy8?keyword=woods%20dixie%20cutter%20m5%20manual%20instructions%20manual%20download
    • http://herve-coiffure.ci/files/tigaxibupexofutuzara.pdf
    • https://lupuxamugegudi.weebly.com/uploads/1/3/4/6/134623484/7406887.pdf
    • https://jobexevufurol.weebly.com/uploads/1/3/4/5/134526996/0187245e287.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/cba3029320028d8a53a151a99a780d27/38732115136.pdf
    • http://www.amoroso-ongakuin.com/upload/files/fulolumopatotavogo.pdf
    • https://springkasteelhuren.be/userfiles/file/jubawom.pdf
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/5629d115a4052.pdf
    • http://thebrownbag.vn/upload/files/67695194413.pdf
    • http://dwornawodzie.pl/userfiles/file/39532936708.pdf
    • https://peburuxe.weebly.com/uploads/1/3/7/5/137517122/bizopigukufefud.pdf
    • http://redagowanieprac.net/Upload/file/zuluvofewutiz.pdf
    • http://www.andreapondika.cz/file/nexowobifolimetubaxure.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1622bbb9801ab8---savonokob.pdf
    • https://vitepoler.weebly.com/uploads/1/3/4/5/134516533/9060264.pdf
    • http://dietetyka-24.pl/images/files/kerotomadazir.pdf
    • http://bluecars.pl/userfiles/file/11133262089.pdf
    • https://cowichanmusicfestival.com/userfiles/file/14180389445.pdf
    • https://galinigogazefu.weebly.com/uploads/1/3/2/6/132695851/743076.pdf
    • https://pisilobeko.weebly.com/uploads/1/3/4/7/134728547/ganimi.pdf
    • http://euromarkcreations.com/new/fck_img/file/67420069349.pdf
    • http://hungbuloon.com/media/ftp/file/paroxej.pdf
    • https://zexawowa.weebly.com/uploads/1/3/6/0/136081798/zuvodipolonos_jasoviz.pdf
    • https://xetiwokew.weebly.com/uploads/1/3/4/7/134741649/6126637.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a341.bin
ebf8abcc3e689be050e2dc54944af35ae75efcb0625ed957875272fc96125d67
pdf-font-stream PDF embedded font (sfnt) at offset 0xA341 10944 bytes
font_01_sfnt_off0000bcb2.bin
01fe04e3dc5bd34eb794a74574cd2161d84a524d65b9e56dd43634c74ea0f961
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB2 16084 bytes
font_02_sfnt_off0000e625.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 16792 bytes