Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6f7532f2049698…

MALICIOUS

PDF

44.7 KB Created: 2020-10-02 09:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 69b44009ee976b62f14ba698321bfb8d SHA-1: 73ffc7f7eaaee009f7d0c2a2adbe932b3f9097f6 SHA-256: 7e6f7532f204969881e63aa6a35907bffa30b00cec9df935284405e60f77dcd9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to a 'study plan'. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=magoosh+toefl+study+plan In PDF document text
    • http://files.spo-celje.si/uploads/1/3/1/3/131398461/1029748.pdfIn PDF document text
    • http://files.sunglassfilms.com/uploads/1/3/0/7/130738928/07ce32.pdfIn PDF document text
    • http://jitati.psweetsntreats.com/uploads/1/3/1/4/131406656/5bed4.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/62c488d4-b2e6-4dc8-9e7c-2af24128070c/vezamaxozodojarizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31137f8-a146-4056-86f7-3c6c164daf63/repusate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1296598a-3eff-4f29-9be2-a8b70f9e5ac7/bovevibefefojimojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e7cab3-6166-43a8-ac89-4aefb701e333/26048929913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/setaburene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9799/6955/files/atom_rpg_trainer_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0558/9920/files/mision_vision_objetivos_y_valores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/kekakozomuben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4091/0755/files/63714537371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/madina_arabic_book_1_free_download.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_off00006fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 5312 bytes
SHA-256: 83855033e14edf954a439bcff9ac1e754f68868a59e4a77fcdf9b72ddd184ffb
font_01_sfnt_off000081fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FC 10580 bytes
SHA-256: 89f2e0d04f72b411c74086c6af93e042c9cd5af23b89f022a268df068da2136f

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