Malicious PDF — malware analysis report

Static analysis result for SHA-256 2297c037f0958f68…

MALICIOUS

PDF

87.9 KB Created: 2021-04-01 21:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b55120f3a89eea146f6a2719852cc2b5 SHA-1: 41209c786b6164ee62f39fc543acf27ae94b933d SHA-256: 2297c037f0958f686f1f0f7749317b27fa82ff5053b681f300e7f3b42988b628
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm for SEO manipulation. The primary URL targets a game hack download, indicating a phishing or scam attempt. ClamAV detection and ML classification further support its malicious nature, likely as a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=marvel+contest+of+champions+game+hack+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486037/normal_5ffa93005b6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_6030e39a3ba7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_603979ca29081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_5fe73eba7de73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_605d4edd3a283.pdfIn PDF document text
    • https://xovonanukotu.weebly.com/uploads/1/3/4/8/134898985/mafaxeduge.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/SuhjjhY/happy_shots_golf_level_84.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/jjGgf6A/guess_the_wwe_superstar_by_their_theme_song.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/hkZOpii/22741040133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_60354f144f9ec.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/3d947ad83.pdfIn PDF document text
    • http://mokuduvejevuz.scienceontheweb.net/pojebibotomarenowo.pdfIn PDF document text
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/vitusotaveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6017950d034c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_6048743b37079.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/how_much_to_paint_a_cessna_182.pdfIn PDF document text
    • https://kowepesabileb.weebly.com/uploads/1/3/4/6/134635017/3098697.pdfIn PDF document text
    • https://sibiwowimi.weebly.com/uploads/1/3/4/8/134868192/2878893.pdfIn PDF document text
    • https://cdn.sqhk.co/davunosedepa/wheCijL/free_christian_movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_603b2c70aacde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_602093f8d34bd.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/hfb0Chj/new_digital_ringtone_mp3_download_2019.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/painting_canvas_shoes_angelus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fc6d911c6c73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xogijowag.onlinewebshop.net/devirazozojabuzanob.pdfIn PDF document text
    • http://visunes.myartsonline.com/14923391414.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 5792 bytes
SHA-256: 51134725971a73311ee391be5f6ae9ef67c2cbac32809ca14661a8c6c7377fec
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 22968 bytes
SHA-256: 8fdb0ef899ad2024dfe1df7e46eb85f4c8cf9f70bb674e7ca5c868f27a3ca205
font_02_sfnt_off00013c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1B 16136 bytes
SHA-256: 573a66b15e623761db71904576a76ca4f3ceadb845d72a25bfbc064a2807f0b9