Malicious PDF — malware analysis report

Static analysis result for SHA-256 15360c68cecdbe4d…

MALICIOUS

PDF

111.3 KB Created: 2021-03-29 03:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c4e1152de24bd60673816a994a6d2e1c SHA-1: 4a3441cc179bd9fc9e029ddaefd8b352986c6dff SHA-256: 15360c68cecdbe4dc96f3ef3c4ae8476cdfb8b4c9f05d0a4ee82695937e7c4f4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary external links points to a URL related to antibiotic classification, which is likely a lure to disguise the malicious nature of the document. No scripts were extracted, but the presence of numerous external links and the overall structure strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://druttle.ru/award?keyword=clasificacion+de+los+antibioticos+pdf+2020 PDF link annotation
    • http://mafonofolifeda.22web.org/ping_pong_lesson_penhold_paddle.pdfIn PDF document text
    • https://rasizuxuner.weebly.com/uploads/1/3/1/3/131378923/tavimemawos_jatezasezelu_dozizulaxuda.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/adestramento_ces_filhotes.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/503101.pdfIn PDF document text
    • https://vesasasafej.weebly.com/uploads/1/3/4/7/134758359/jojitaf_zurojonuj_xutevo_tivurakof.pdfIn PDF document text
    • https://widebevuzolari.weebly.com/uploads/1/3/4/7/134705185/8181877.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb209e34-24c3-4901-88bd-c00af8cda710.filesusr.com/ugd/de6798_e66afa6f967b4a8ea49410c17ef321c1.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_87649908396e43b69abd46ec8f337771.pdf?index=trueIn PDF document text
    • http://lirufuti.epizy.com/monsters_inc_scream_canister_portable_charger.pdfIn PDF document text
    • http://refuzopil.epizy.com/48073027592.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_f42db243bc0b4511ab941ec5776817a9.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_f892e4e55e204797b2952372e7c31558.pdf?index=trueIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/32707440501.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_2bcf10b3669a40acad50fb5ac6487e78.pdf?index=trueIn PDF document text
    • http://gapumigexoze.epizy.com/juzonojuxenigubodavog.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_4775b166a984430d856817d5b3eff677.pdf?index=trueIn PDF document text
    • http://rufapapufogap.onlinewebshop.net/40783640225.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_9dc76bd243e942e2ae923eb7568cdee8.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_a44944d710854fa89f9936e18a6407f9.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_ae513896e2a94d8786c05de120a8a089.pdf?index=trueIn PDF document text
    • http://kilobawul.rf.gd/65461032977.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_134f97b9e5c64f60885574eff9d53cdb.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_e410f3dc58d449d386c21436a578ca4b.pdf?index=trueIn PDF document text
    • http://jomupaz.myartsonline.com/pakarad.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_76f21db4689845cea9ae52d6cb57f1f2.pdf?index=trueIn 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_off00015e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E32 5372 bytes
SHA-256: 248e01d5ad9de9dc4a369c63c9d2c94493cd9e45826ddfcdcef42ba8ee7672d6
font_01_sfnt_off00017082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17082 12272 bytes
SHA-256: e67e5fd6f6f4dc39e8c4eb7e67cfa3b780d22298754e3775cf0cc6ada8cbd835
font_02_sfnt_off000198a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198A7 16092 bytes
SHA-256: 20072c22622009a568084930e860e0743cabddbec4e2beba5695ffbb5f390d28

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