Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2f12bd30ef5a0c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-10 11:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 204e94e37d2f3b19f9bd9cc73144da36 SHA-1: ff5687743dce9aaff7c7c7d5a022a1b72a618458 SHA-256: fa2f12bd30ef5a0cb0a38d5ccbfa25284252b94b253f1248d42566015dec256c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://xajibur.ru/strik?utm_term=firehouse+subs+menu+and+cost PDF link annotation
    • https://cdn.sqhk.co/wodelaganav/jOiahjf/xinapezodizogu.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/gcxPWid/wewebazexonewejixaxu.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/icse_class_5_math_book_download.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/fuvazuwapelegewin.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/Rjfia8G/50_in_1_electronics_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/GYjbChe/wilisazuviwoguribugef.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/Pgggh3c/1265124878.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/nezujevinobarekesabufekag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beperedusewigu.epizy.com/joborirojemifafudozog.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_cde8ab1a043e478ea31b99fe3881050d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ea9e05-8105-4699-9bac-22560b91a70e/85199197527.pdfIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_7adf8ac4ee0744fa91d78fcc2ba642ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a096f42-961e-4df6-8975-cb21f077bf30/legend_of_the_christmas_rose_pin.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_a5489fb14d66440d9a519a01fd499622.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_8653ff18aa604dd783b30305a3a50257.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e8ca2f-c553-4270-baf8-b1daaad40698/nanifuli.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_fd4a956071214ba480465fcd09090b89.pdf?index=trueIn PDF document text
    • http://nanaxidimidi.atwebpages.com/mecanica_vectorial_para_ingenieros_dinamica_8_edicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94523b8d-77e1-47ce-8f35-6ab660f925d7/56180928379.pdfIn PDF document text
    • http://tikikenuf.epizy.com/babylon_translator_for_pc.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/why_dont_i_have_empathy_anymore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93c23fb-2d25-450c-acf0-918b5d1b915e/kurt_vonnegut_cats_cradle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f81ac1a-1793-4f64-86aa-a529ec056e19/rawubujiwumesifuxejat.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/pobumizeni.pdfIn PDF document text
    • http://tevizowubutek.rf.gd/21806733607.pdfIn PDF document text
    • http://nuguvumaxexuwus.rf.gd/breville_bov900bss_vs_bov800xl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98c0d0f-e285-40f3-9f63-39ff84c23f43/75988507390.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_off00010058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 5244 bytes
SHA-256: 02906315e4c9e0eac3e2ed419d411cc8d2ee9989747160aff06733c4b8734c86
font_01_sfnt_off000111f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 11068 bytes
SHA-256: 9dabc35420623fd52d1650c9e69b6b8396bb10e90a81c6c5ed6ceab1af6a5a91