Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f971b03b85cd936…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 17:20:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 06333d4ec07bfb1d82a0913aec607067 SHA-1: 4dd87e4b07df70415f4f9ab652594b36484c5668 SHA-256: 0f971b03b85cd936bd11fb4929b074d9bc327c7c41d0966fcf00238101b02295
252 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external websites, a common tactic for distributing malware or conducting phishing campaigns. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector strongly suggest a malicious intent to lure users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/wix?keyword=blackwing+lair+guide+vanilla In PDF document text
    • https://cdn.sqhk.co/xegapanasa/jfcge5W/final_fantasy_xv_pocket_edition_android_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5ffff7b92c7c1.pdfIn PDF document text
    • https://cdn.sqhk.co/disemelukap/BKgejjj/crazy_taxi_classic_hack_game_download.pdfIn PDF document text
    • https://fezizijopugasu.weebly.com/uploads/1/3/4/8/134850826/dofurugalagafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413235/normal_5fcb9d55747c7.pdfIn PDF document text
    • https://pagebuso.weebly.com/uploads/1/3/5/9/135972497/rusasugijilufapifu.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/ogdjhiX/ho_model_railroad_control_panel.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/363550f.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/zexutebi_vumemimixabun_kuxadatubuxi_veduf.pdfIn PDF document text
    • https://bitugibetofovo.weebly.com/uploads/1/3/0/9/130969362/sepas_beluwufa.pdfIn PDF document text
    • https://pagipakudux.weebly.com/uploads/1/3/5/3/135343553/5677609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6031ecc7bfeb3.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/dYicQHa/gacha_life_2_gameplay_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/giHhjhf/lilejisekalazopejupel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_601fb9b05ddfe.pdfIn PDF document text
    • https://sazeduxawi.weebly.com/uploads/1/3/2/6/132695343/a4206c5ce400508.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/hdnigRT/racing_in_city_car_driving_mod_apk_download.pdfIn PDF document text
    • http://vuvepexuja.22web.org/landing_page_wordpress_templates_free.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/Ngge7if/48871857669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megegadimopef.rf.gd/88907520304.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_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5192 bytes
SHA-256: f4e602d1e5e48e62cf71c271b3622c93514dfa82404eadfaa4592db0e41e1e7d
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 9928 bytes
SHA-256: d939cb7ca3fe8a073e22ecb3f1c012996db78d93e20178e90a72b624bd73db7e