Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e0b58bd2e9d619…

MALICIOUS

PDF

77.2 KB Created: 2021-02-22 23:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4f3704b18495fb2d18c9f0cefd40803 SHA-1: b321a9a90c05aab12d7f7e5db1bbc70f6b4e4853 SHA-256: c8e0b58bd2e9d619a2a4c5f7e7910dbc6f884dfdce4c665ef12aa42187064470
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious external sites.

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
  • 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://bologen.ru/strik?utm_term=jitterbug+lively+flip+phone+reviews PDF link annotation
    • https://cdn.sqhk.co/kofosenolo/2Eiihgd/pixel_car_racer_apk_mod_free.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ghjbggO/assistant_manager_resume_duties.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/ia2hd6s/status_video_download_sharechat_tik_tok.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/jbEzgMr/survivalcraft_2_download_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/nI3ijhc/pozedisikozisu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/IhcQYjc/psoriasis_shampoo_walgreens.pdfIn PDF document text
    • https://zunutupere.weebly.com/uploads/1/3/1/4/131453944/26f42.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jhWzkj7/monisodukijewuw.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/dfijvgd/cash_app_customer_service_number_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/iazhdaZ/sidagoruvajedajuzufef.pdfIn PDF document text
    • http://shoppermarket.online/174072468361bkb7.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/VIhhBhh/tagalog_worship_songs_with_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/jhj8hcL/danigorupatajajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/lhdiajj/monstera_plant_leaf_turning_yellow.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/vezevefolijerunewu.pdfIn PDF document text
    • http://idealica-tufficiale.website/985253824057ye2i.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/gajabedafot/tonexopejasogelonodeke.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/xetamewizuk.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/8295674302.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/bosch_300_washer_dryer_specs.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_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 5336 bytes
SHA-256: d58ee89ddb6be0c1430f65d6aded163eb2b855fac2a1a12825671c131d161134
font_01_sfnt_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 11068 bytes
SHA-256: cb60a54efad5760460d189a466be3d41b058b54a8edefa270577ad9fcb521374

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