Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afa555c2e680c54…

MALICIOUS

PDF

88.0 KB Created: 2021-04-24 07:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: df53383cd7ee5bf8d56b63fe182484c6 SHA-1: cf8ea4a187dbeaa905efee9b23a98210d5c28507 SHA-256: 7afa555c2e680c5482c2289a250f8f9d267e9c8b63533205d58bb9554fada804
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body references 'Macbeth act 2 scene 1 soliloquy' to disguise its malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=macbeth+act+2+scene+1+soliloquy PDF link annotation
    • https://cdn.sqhk.co/sowumavag/jgWKijX/32658147682.pdfIn PDF document text
    • https://cdn.sqhk.co/xobetetivuzi/oByYIWZ/integrated_math_3_homework_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/ggejeie/offline_hd_wallpaper_apps.pdfIn PDF document text
    • http://cyberlife.store/morizadabeferuxavapopffq7i.pdfIn PDF document text
    • http://magazinrf.xyz/28578729320if8hx.pdfIn PDF document text
    • http://testvvd.xyz/kezuxojisikedezokonoad4.pdfIn PDF document text
    • https://cdn.sqhk.co/juvekuvop/PVLaiiN/grand_hotel_sunderland_direct_telephone_number.pdfIn PDF document text
    • http://omerkatanalp.com/filmora_9_apk_download_pcoud7s.pdfIn PDF document text
    • http://crubr.space/gratin_de_moules_au_currylbubc.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/FCjcHhb/zilodakisukinenaba.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/PjdQhcj/wubuzojemivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafalox.rf.gd/unidad_4_leccion_1_reteaching_and_practice_answers_avancemos_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/fiminaxutelu.pdfIn PDF document text
    • http://mutupoda.rf.gd/45769794872.pdfIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_77feed8483bb46828c57bb23835ed4d0.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_5352bccdc21f4a60b81e235c5ae5d434.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/pixole.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/10_core_values_of_zappos_company_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/contemplate_on_something_definition.pdfIn PDF document text
    • https://4b3c1411-62fe-4b74-ac0d-dad8ff5dd90a.filesusr.com/ugd/d10829_dd0e0668a7094b849ea4025a00628661.pdf?index=trueIn PDF document text
    • http://zevofelajasuz.epizy.com/27757277397.pdfIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_20fc876101464cc68efe47364a1c1a32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/beverly_hills_movie_in_twi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 5348 bytes
SHA-256: 96b3bbcbc7bdb966e118c44f40f8d3c2296b46aca888b2a0b3ed678f84a62cc1
font_01_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 11116 bytes
SHA-256: 17ad51dbaf6960263ae3c3b03b049dc632ebf4a7f9e9e634cd690b2167a77591
font_02_sfnt_off00013d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D34 16104 bytes
SHA-256: 537e079f73b26092285abb7ff4a1b47bb6cc769f22c360318a2f24558621e701