Malicious PDF — malware analysis report

Static analysis result for SHA-256 6330b1beeaa70d73…

MALICIOUS

PDF

78.3 KB Created: 2021-02-25 23:27:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fda32875bd34ca5c75e9d714b8d28d17 SHA-1: 83dbf147a6a505c44bd678118c52e63603794c83 SHA-256: 6330b1beeaa70d73ec96fd85596323027abcdce139fb08f693dcc57c9dd5e27c
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms, suggesting a campaign to drive traffic to malicious infrastructure. One critical heuristic indicates a direct link to known malicious redirector infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely leveraging social engineering to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=keto+charge+ingredients In PDF document text
    • http://tixesikixux.mygamesonline.org/nisazozijemidim.pdfIn PDF document text
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/2251473.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/dasenoxurox.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/1914384626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5ff51f63a5301.pdfIn PDF document text
    • https://gizivesokopupa.weebly.com/uploads/1/3/2/6/132696604/4a10bfbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416930/normal_5ff556d84588d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_60297843713ec.pdfIn PDF document text
    • https://cdn.sqhk.co/nijusukelok/jh1hg94/download_game_sweet_crossing_snake_io_mod_apk.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/autocad_2d_furniture_blocks_library_free_download.pdfIn PDF document text
    • https://vagafanuwojuxiv.weebly.com/uploads/1/3/0/7/130776749/7654587.pdfIn PDF document text
    • https://bitugibetofovo.weebly.com/uploads/1/3/0/9/130969362/jukisowojazokuxoz.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/igcY2hb/best_offline_multiplayer_games_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pasutiz/solidworks_edrawings_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/28933614260.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/bnf_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/best_ecommerce_platform_for_affiliate_marketing.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/amazon_app_karo.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/hunger_games_map_minecraft_ps4.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_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5136 bytes
SHA-256: cf313f5c509a6fca7eb65a8c14d878d2fe075de865b909b7be0c1215536c8ea1
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 10476 bytes
SHA-256: ca6789de95c2e0d5e2fe33d17cc14ca1c3dee487c8ba15de03dd4709239d0d43

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