Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0f2c783013d89a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 08:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a19af6db73cdcb73f596d7ab507fcecf SHA-1: df341df1c8ddd391322ea1ef7c4b43e529e7d3dc SHA-256: ff0f2c783013d89a383b433c277199a8b188852acec47372d64effd8f4c8d453
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to malicious sites for credential harvesting or further payload delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://bologen.ru/wix?keyword=super+dancer+voting PDF link annotation
    • http://opros.xyz/how_do_i_restore_my_samsung_to_factory_settingsqt10o.pdfIn PDF document text
    • https://mejatuwunuzawe.weebly.com/uploads/1/3/0/7/130775850/ff506304f.pdfIn PDF document text
    • https://reledizov.weebly.com/uploads/1/3/0/7/130775001/e99fea253264.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/banowafokot.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/walumul-vinuvowedugi.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/yfidgfL/minaligexotililazetof.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/jaijChb/baby_bunting_phone_number.pdfIn PDF document text
    • http://yellownatural.space/planeacion_telesecundaria_primer_gradorg2bw.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/advanced_excel_training_syllabus.pdfIn PDF document text
    • https://rinalodejivew.weebly.com/uploads/1/3/4/3/134383373/05bcc9ba8e78.pdfIn PDF document text
    • http://afracheat9.xyz/kenmore_elite_he3_washer_troubleshootingbzpv9.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/yejgf8s/lebudifudadezariwi.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/free_queen_size_loft_bed_plans.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/sagas.pdfIn PDF document text
    • http://paselon.getenjoyment.net/classification_of_anti_tuberculosis_drugs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0211d79-c072-4393-8e55-ecf9dc7f5a17/saul_alinsky_12_rules_for_radicals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f1f662-0f90-4baf-9451-adb8b72d51bc/tevaru.pdfIn PDF document text
    • http://saziwujezad.epizy.com/acacia_auriculiformis_benth.pdfIn PDF document text
    • http://pugobafujopelat.epizy.com/babuxipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78315a4f-f41e-44eb-a2ff-ddfeed6513ea/history_of_the_black_dollar_free_download.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/sususopexanixusotafebopi.pdfIn PDF document text
    • http://sorotakadu.rf.gd/berkshire_encyclopedia_of_world_history_vol_3.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_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 5192 bytes
SHA-256: 9f84e1127476f5a2348885d018a9ae4cd33013cdbcd3fe00cb6eeaaab6ad330a
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 10436 bytes
SHA-256: 8d8ebf0617191a954cfe6e30a03e12e6f77a079212e0d352a58919608db6a8ad

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