Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdc67bd68e8897a…

MALICIOUS

PDF

129.1 KB Created: 2021-01-08 09:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f4a6efa4c9ab7fb3e0b13a30b7c1014 SHA-1: 7df1e4367e10fa4284630c2cac943e3af0f22c00 SHA-256: 1cdc67bd68e8897a4f2c3ec3ba187d3ae9de32560d21b78a67319b9db0f80bb3
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic further suggests a large number of links pointing to potentially malicious content. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file, classifying it as a phishing or trojan PDF. The embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cctraff.ru/wb?keyword=jobmania%20eternal%20dungeon%20job%20guide In PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/pemebipatoziz.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/xixuxuna_zumewuko_rotimepa_rolop.pdfIn PDF document text
    • https://nejotadig.weebly.com/uploads/1/3/1/1/131164569/lezazevabelev_wulidobaw.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/1376160.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/bizizepanerinurop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60348804-98f4-4567-aaca-87b16c1c3ff8/gods_of_egypt_download_in_hindi_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fbba1c-b333-4bc5-98f4-587a954c4cc3/51552588053.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/lakers_bleacher_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d724ca-435a-4c7a-99f4-641a8456592a/89983223911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ead04b8-c8b2-46f2-99aa-5328540b2036/zosuwuributifumadu.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/powerpoint_templates_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692a1477-3913-4e36-86a6-0039253a41a8/dyson_pet_vacuum_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd354d7-8cda-4078-9b2f-f8b4329ed02d/75991897618.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00019ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19FF0 6264 bytes
SHA-256: 53cd2778764a9c58db792d8b5baf32618b92877065d61b243f63820ff8105b3e
font_00_sfnt_off00017e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E2B 6568 bytes
SHA-256: 18f4960a52d64bc83d6c304eee4b25c9ca37eec54c0f4efd5701b5568bea1fd1
font_01_sfnt_off00018e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E7A 5172 bytes
SHA-256: 5f34e11ab5699474b22656005919492455a662551648100700e8a77de85d0ae6
font_03_sfnt_off0001b679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B679 11840 bytes
SHA-256: e91b3a4f60fec3ec9872a7d30bab1884c0a457268125ddb0353086c53f75cbdb
font_04_sfnt_off0001dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD4B 17168 bytes
SHA-256: 13569e0735e6238d593745350b14276a15f0c74f99e7bada34249f4f0c163fa5

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