Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed6bb38c13b2bb8…

MALICIOUS

PDF

101.5 KB Created: 2022-06-09 21:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: f0b9ac249c278637cca84373cf521f40 SHA-1: 95707c7f47909a22ab56feee8ae4325f7d36df4e SHA-256: fed6bb38c13b2bb82ccbf33ce48e82de74be4650adcb4452a4d40546ef8f00a7
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The primary malicious indicator is the presence of a link farm pointing to external URLs, one of which is https://norin.co.za/YmrXLWy8?keyword=hellblazer%20original%20sins%20pdf%20online%20test%20results%20list. This suggests the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://norin.co.za/YmrXLWy8?keyword=hellblazer%20original%20sins%20pdf%20online%20test%20results%20list
    • https://vowobonu.weebly.com/uploads/1/3/4/8/134853209/vevedatujer.pdf
    • https://mb-classic-service.de/userfiles/file/69241631236.pdf
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/8145584.pdf
    • https://wowagobez.weebly.com/uploads/1/4/1/6/141673096/xomig-mexutovuloz-gojino-kotadedojafapek.pdf
    • https://gewopisoxow.weebly.com/uploads/1/3/4/3/134306678/c608cd.pdf
    • https://tozupolut.weebly.com/uploads/1/3/0/9/130969077/675c26a0ca5c1.pdf
    • https://dawurawo.weebly.com/uploads/1/3/5/3/135323901/kiroju.pdf
    • http://j-line.ca/fck_upload/file/44284030610.pdf
    • https://piwetidij.weebly.com/uploads/1/3/2/3/132303123/9772691.pdf
    • https://zopokirupinurow.weebly.com/uploads/1/3/1/3/131381130/8250622.pdf
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/rukogigexu.pdf
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/4785364.pdf
    • https://vhssirimpanam.org/ckfinder/userfiles/files/nezemijavu.pdf
    • https://atrium-architectes.fr/news/files/41684243616.pdf
    • http://medigroupvn.com/upload/files/ladisosikem.pdf
    • https://jamelowo.weebly.com/uploads/1/3/1/6/131606155/858db72.pdf
    • http://bpsstudio.hu/uploads/59631629090.pdf
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/65978414999.pdf
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/fomibosadivi_dobinimedo_ragigelam.pdf
    • https://kanogerigan.weebly.com/uploads/1/3/4/6/134657300/jaloxatixafefur-bukexatokusuxa.pdf
    • https://thai-airpark.com/ckfinder/userfiles/files/23605166464.pdf
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/6006146.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001097e.bin
3b81afe2952cf00fa13abb0ff44f079445a703a4bcfef63f47ec9b9889c1a1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x1097E 20672 bytes
font_01_sfnt_off00013fe1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE1 16792 bytes
font_02_sfnt_off000157f2.bin
207eb3b51995adbdef2a766e0364e2c2ee182a7f0f0647c12a4a3807efc046f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x157F2 16220 bytes
font_03_sfnt_off00016dd7.bin
28f80946cb596ead2067c102cd438d31f210b523cef06ea252d9ba4ab898ea76
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD7 10964 bytes