Malicious PDF — malware analysis report

Static analysis result for SHA-256 c978de92807ccccd…

MALICIOUS

PDF

82.0 KB Created: 2020-12-10 09:01:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa6a8b1e3715149cbbad6f1ae3643557 SHA-1: c3250b4035e4f8dc76862ad3252ed36b70758782 SHA-256: c978de92807ccccd04d8788f9bd7e80819c0c757e1957595d8b2e45af89518d5
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the extracted URLs, 'https://trafffe.ru/123?utm_term=dbz+legends+apk+obb', is directly associated with the lure of downloading an 'apk obb' file. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', indicating a phishing and trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafffe.ru/123?utm_term=dbz+legends+apk+obb PDF link annotation
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/261add00245.pdfIn PDF document text
    • https://wevepoguf.weebly.com/uploads/1/3/4/7/134717949/tekoxewowuz-jovijijaf-jiwajededas.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://gutamunimidujad.weebly.com/uploads/1/3/4/6/134667749/900daf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc174bfa5bc066edfa992ec/t/5fc3eaf3a97599144e70f484/1606675188642/cool_stuff_to_draw_step_by_step.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65167084698658e833d4e/t/5fce138eeb18547f4bab69ce/1607340942442/download_fun_race_3d_no_ads.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/takafakupugukifukeveru.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/34044198763.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1725bcb0228a282b335/t/5fc8a3b192e74531f3d0a37e/1606984626753/toxelopomozusuwolopod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc519b07d0c8f249d5c1082/t/5fcd29686f0099009e6c7ce6/1607281000897/best_video_player_app_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4af29ee0f32b8749da5b/1606372082955/12742537632.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/rejikivolurosejabepirir.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011376.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11376 22968 bytes
SHA-256: a8f12927fca6e0b594bec259e607444dadc510e21e893c6bf4c98c629ab7f025
font_00_sfnt_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 5284 bytes
SHA-256: 412e0e111976afc46b13809e7ea5b9b083cbed39ae5e16c2ff2b5a990bfd5f55
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 11524 bytes
SHA-256: 5a957bdd89349188a6395514c943007c4677ff5126ec32c63b971ee5b79e0b6c

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