Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ea2f94f7a42536…

MALICIOUS

PDF

76.8 KB Created: 2021-03-08 06:37:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 001397cb1801ba219d73b93a9fc4d86b SHA-1: b696a0812e8739840aff9917f50f1d390b5d3df1 SHA-256: 82ea2f94f7a42536a4279cb116dc1cb6b2f6200332cdcd682030cd090505bf8a
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, characteristic of an SEO spam or phishing campaign. The document body, though partially corrupted, contains keywords related to "Kaba locks installation," suggesting a lure to trick users into visiting malicious or deceptive websites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wix?keyword=kaba+locks+installation PDF link annotation
    • https://cdn.sqhk.co/lojosewude/gfhj3ih/roadrunner_animal_hospital_az.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/ijgcjjg/85099922483.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/hbUr8ie/chicago_blackhawks_hockey_fights_cancer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/cci6jdc/madujelepeta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5ffd182fd8ef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_5fe508292d1f1.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jcghwha/vanobutizoboza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5ff3a337ec21e.pdfIn PDF document text
    • http://xugerovogubex.22web.org/2064526641.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/is_a_water_flosser_better_than_interdental_brushes.pdfIn PDF document text
    • http://direkepexeg.22web.org/masejepudopukeletozas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenefidozepojig.epizy.com/pezosikawezumew.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/scansnap_s1300_setup_download.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_08589ad8576a40a083615457747ce4c8.pdf?index=trueIn PDF document text
    • http://vapavaze.rf.gd/resumen_del_libro_el_vendedor_mas_grande_del_mundo_capitulo_2.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_f823c4915fdf421d980a0aece141defb.pdf?index=trueIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/tugevatofukij.pdfIn PDF document text
    • http://sipitifijuju.epizy.com/software_libre_monitoreo_de_red.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_38097122346d4fa9a0c49d20ac42da7f.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_7eab5d8137b8449b9352357b3b72d945.pdf?index=trueIn PDF document text
    • http://fumaresaxebikab.epizy.com/how_to_set_up_your_orbit_sprinkler_system.pdfIn PDF document text
    • http://panafinuniro.epizy.com/timisakuvejunawanozagusa.pdfIn PDF document text
    • http://mepolubigujume.rf.gd/digaxejifadaziwamuvokuki.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_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 4872 bytes
SHA-256: 3e5821878458fb7b0e48aa8c5f093565f91698930b4817ee31648f0c949fe808
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 12100 bytes
SHA-256: c3d7ae55759aa35d998baded128ecc43dc3b86bd94b7077f4e3467da08dec03a