Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c65e56a3d39f430…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 03:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a251de8e4f365735f337b19e3cc29cc SHA-1: e8332023a952de13057939123f956ae16e923b2b SHA-256: 9c65e56a3d39f43091aa8e348767dd073dd77b6b11cb095b616f039e5f806f47
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The document body, though partially obfuscated, suggests a 'worksheet' lure. The presence of external URIs and the link farm heuristic strongly indicate an attempt to redirect users to malicious or spam-related websites, likely for phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=isle+of+hope+isle+of+tears+worksheet
    • https://cdn.sqhk.co/fetedudi/b7LPcia/92556325949.pdf
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/baposazomix-kupavopovu-juwitarijela-welagenilojo.pdf
    • https://jezexubuxerib.weebly.com/uploads/1/3/4/0/134040893/2287915.pdf
    • https://nigelatadumave.weebly.com/uploads/1/3/4/6/134615228/066a14c94.pdf
    • http://vugewanir.22web.org/preschool_admission_form.pdf
    • http://lilubaxubaxulu.sportsontheweb.net/whats_after_3_4_of_an_inch.pdf
    • http://bitiwiz.medianewsonline.com/vizio_sound_bar_part_number.pdf
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/kadekedomasak-zexanetokutafaf.pdf
    • https://cdn.sqhk.co/zedazisem/ihggthc/90707238297.pdf
    • https://cdn.sqhk.co/binebelezux/jbYifhh/angry_birds_2_movie_clips_10_10.pdf
    • http://losiruwu.66ghz.com/16860248500.pdf
    • https://cdn.sqhk.co/nuzozuni/fih4YL0/psoriasis_scalp_hair_loss.pdf
    • https://cdn.sqhk.co/depivuni/z5k4Dib/robot_carnival_anime_news_network.pdf
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/zuxotuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakekojezutok/suxil.pdf
    • https://s3.amazonaws.com/polexebuj/2004_polaris_predator_500_wiring_diagram.pdf
    • https://s3.amazonaws.com/potamotaz/raxabakajogul.pdf
    • https://s3.amazonaws.com/gonima/sijadipupemabavirozabusa.pdf
    • http://nitubak.atwebpages.com/how_to_connect_fitbit_versa_lite_to_iphone_bluetooth.pdf
    • http://rugoxesoteko.myartsonline.com/all_of_me_jazz_violin.pdf
    • https://s3.amazonaws.com/nefomojuwet/55291981445.pdf
    • https://s3.amazonaws.com/tuxutedi/ionic_vs_covalent_bonds_worksheet_answer_key.pdf
    • https://s3.amazonaws.com/fomaralunex/98905375010.pdf
    • https://s3.amazonaws.com/xeropizuwe/live_map_traffic_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effd.bin
91a92bc25c38fc24ca75901a2652656a82e96f3b41fb20f375c8df39196a650a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 5080 bytes
font_01_sfnt_off00010152.bin
870532a32fe0064c2305a891ab4dadd38383f075ffd5234a6bdd93eb186512b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 10344 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.