Malicious PDF — malware analysis report

Static analysis result for SHA-256 01feb8f435e47f55…

MALICIOUS

PDF

78.2 KB Created: 2021-05-17 11:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ff5dd6fa2ba93a7b98c35948508857f9 SHA-1: aeb81850bd959f596e6559baad9b73898ee865d3 SHA-256: 01feb8f435e47f557223574a775efcac76e9cc4ea0cc9463d1e2d3a54c19b8b8
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to product searches, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of malicious links is sufficient evidence of a malicious redirection attack.

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 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.
  • 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/strik?utm_term=who+sells+mtd+riding+lawn+mowers In PDF document text
    • http://tuvivukaroj.mygamesonline.org/hp_officejet_5510_all_in_one.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/bseb_patna_10th_model_paper_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/gz7CQge/11568443315.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/anatomy_and_physiology_lab_manual_6th_edition_allenp2mdt.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/WahjyJp/how_to_download_mobile_application_in_pc.pdfIn PDF document text
    • http://nicepics.xyz/vowilubagopavusijen3fg3d.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/how_to_change_battery_in_g_shock_ga_1000.pdfIn PDF document text
    • http://in-arenas.com/rainbow_metal_pocket_knifemkr5c.pdfIn PDF document text
    • http://peuly.xyz/causative_have_and_get_exerciseznvs9.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/bifatigugibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_3b84cb3c45804fd896beb48490044585.pdf?index=trueIn PDF document text
    • http://gulagopafed.onlinewebshop.net/creative_writing_prompts_for_adults.pdfIn PDF document text
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_5681a7990a784b34b0625ee54fe5a793.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/homelite_backpack_blower_carb.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/92775397606.pdfIn PDF document text
    • http://majezomisi.myartsonline.com/93344956987.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_1a9cefaba3424a46bf02618337125a8c.pdf?index=trueIn PDF document text
    • http://piwolimosopobu.myartsonline.com/53671941665.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_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 5344 bytes
SHA-256: 01be4610deb5f0d3d4e7133c5b87045de580278af4c0c091a064977679cc2fda
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 11564 bytes
SHA-256: 4f79c680dd46f6a1dfaee07d97ab85461f8dc58f8f4b2a285f5b23dc0c822a7d

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